NOTES ON CANCELLARIIDAE (MOLLUSCA: GASTROPODA) RICHARD E . PETIT R ESE A R CII ASSOCLlTE) P ~ 1 LEONTOLOGICAL RESEARCII INSTITUTION I'l'HACA) NEW YORK ABSTRACT In 1811 Perry (pl. 51) described Trigona Two generic na1nes, Biv etia and V en­ pellttcida, prior to Blainville's introduction tJrilia, that have been misunderstood and out of Trigonostoma, and prior to the descrip­ of 11se are discussed. One new generic name, tion of D elphinula trigonostoma Lamarck A gatrix , is proposed and Cancellaria de­ ( 1822, p. 231). Perry's generic name was pressa Dall, a preoccupied specific name, is invalid due to the prior Trigona ]urine, replaced. 1807. Almost all works on Trigonostoma Blainville show Trigona Perry as a synonym, In 1887, Jousseaume published his mono­ but none have adopted Perry's specific graph on Cancellariidae, describing several name, pellucida, which remains valid even new genera and species. Two of these though his generic name is preoccupied. genera, Bivetia and V ent1rilict, have not been Therefore, this species should be credited to in general usage as the identification of the Perry, and properly should be ci ted as Trig­ type species has been doubtful. Specimens onostoma (Trigonostoma) pellucida (Perry), of these species were identified by the 1811. author and sent to Prof. E. Fischer-Piette Perry's name cannot be dismissed as a of the Museum National d'Histoire N atu­ nomen oblitunz as it was used by Grant and relle in Paris for comparison with the types. Gale ( 1931, p. 622) in their remarks about Prof. Fischer-Piette confirmed the identifi­ a species of Cancellaria. H owever, they also cations. used Perry's genus Trigona, indicating that BIVETIA Jousseaume, 1887 this name has priority over Trigona von Mi.ihfeld, 1811, but not mentioning Trigona Bivetia JoussEAUME, 1887, Le Natur alist e, (Ser. 2) v. 1, fasc. 14, p. 163 (with fig. ]urine, 1807. It is unfortunate that a well 1) ; 1888, reprint, p. 10, fig. 1. known specific name such as T1'i gonostoma Type species: Bivetia m ariei Jonsseaume, trigonostoma must be replaced. 1887 [== Cancellaria indentata Sowerby, 1832], by monotypy. TRIGONOSTOMA (VENTRILIA) Jousseaume, Bivetia, with its monotypic species 17za1riei, 1887 was described from a single specimen of Ventrilia J oussEAUME, 1887, Le Naturaliste, ( Ser. 2) v. 1, fasc. 16, p. 194 (with fig. undetermined locality. A specimen of C a J~ ­ 2) ; 1888, reprint, p. 12, fig. 2. cellaJria indentata Sowerby, 1832, was sent Type species: Ventrilia 'ZJentrilia Jous­ to Prof. Fischer-Piette who confirmed that seaume, 1887 [==Cancellaria tenera Philippi, the two are conspecific ( personal communi­ 1848}, by monotypy. cation, August 19, 1965 ) . The type has This genus is based on the species V en­ been incorrectly cited in the literature as trilia ventrilia, described from an unknown "Biuetict 1nariae." locality. Jousseaume expressed regret that Bivetict is more closely related to E11clia he had been unable to compare his speci­ than to Cancellaria s.s. and it seems ad­ mens with the poorly described Ca1zcella1'ia visable to retain its generic status pending stimpsoni Calkins, 1878, and it is most un­ further work on the relationship between fortunate that he could not do so, as the the various taxa in this family. Bivetia is two species are the same. Furthermore, both not closely related to Bivetiella as specu­ are synonyms of C. tene1ra Philippi, 1848. lated by Marks ( 1949, p. 456). Prof. Fischer-Piette compared a specimen of TRIGONOSTOMA Blainville, 1827 C. tenera with the type of V. ventrilia and T1·igon ostonw BLAINVILLE, 1827, Man. Mala.­ has advised that they are the same (personal coloo·ie et Conchyliologie, p. 652 ( = Tn­ communication, August 19, 1965 ). Ven­ go n~ Perry, 1811, non Jurine, 1807) . trilia is a valid and useful subgenus of Type species: Delphinula trigonostoma T1·i gonostoma and will repl~ce Emmonsella Lamarck, 1822 [== Trigona pellucida Perry, Olsson and Petit, 1964, wb1ch becomes an 1811], by monotypy. objective synonym of V entrilict. 217 218 T11lane St11dies in Geo logy Vol. 5

AGATRIX Petit, n. gen. Type species, here designated: T rigonos­ tonza agasrizii Dall, 1889. R ecent, North Carolina to Gulf of Mexico. Shell small, with a t urreted spire of widely shouldered whorls. P illa r slightly perforate, the shelf of t he inner lip over­ hanging and appressed against it so a s to close it almost complet ely. Reticulate sculpture formed of strong axia l r ibs crossed by spiral cords produ cing small nodes at the intersections, the axials sharply cr ested on the shoulder and in life the shoulder nodes adorned with small t ufts of brist le­ like periostracum, giving the whorls a coro­ nate appearance. Aperhue ovate, bearing below a strong siphonal canal. Columella with two equal descending pla its and a keel at the end of the pillar. This new genus is necessary in order to place not only the type species, but the congeneric CaJZcellaria strongi Shasky from West Mexico. In describing Cancellc!rict .rtro11gi. Shasky ( 1961, p. 19 ) mentioned the fact that there appeared to be no exist­ ing genus to which his species could be as­ signed. Crmcellcwia zctp oteca Bose, 1910, from the Neogene of Tehuantepec 1s an­ other congener. Further study of the Cancellariidae may determine that Agat1'ix should be used as a subsgenus of an existing taxon, but it ap­ pears now that it should stand as a genus. No other genus of the family is known to have the peculiar coronate periostracum de­ scribed above. Two specimens of A gatrix agassizii, with and without p erios tracum, are shown in text figures 1 and 2.

T RIGONOSTOMA TAMPAENS IS Petit, Figure 1. A gatrix a g as s LZ l ~ (D a 11). Slightly immature specimen with periostra­ new name cum int act showing tuf ted nodes on sh oul­ The above name is proposed for Cancel­ der. H eight 8.6 mm. West of Panama City, la1'ia depressa Dall, 19 15, U.S. N ational Florida , f r om appr oximate depth of 180', U SNM 678306. Museum Bulletin 90, p . 48; not Ccmcellctria Figure 2. A gatrix agassizii (Dall). Ma­ dept'essa Tuomey & H olmes, 1857, Pleio­ tul·e specimen with periostracum 1·emoved. cene Fossils of South Carolina, p . 143. H eight 12.4 mm. Same locality a s previous figtne, U SNM 678306. Proper assignment of this species to a sub­ genus must await further study of the family. The custom of replacing a pre­ BIBLIOGRAPHY occupied name with the name of the origi­ BLAINVILLE, H. M. D. DE, 1825-1827, Manuel de Malacologie et de Conchyliologie. Paris. nal au thor bas not been followed in this Two vols., 190 pls. [Text p. 1-647 issued instance, as there are at least two species in 1825; p. 649-664 and plates issued 1827] the family with specific names honoring BosE, E MILIO, 1910, Zur jungtel'tiiiren Fau­ Dr. Dall, and another could be confusing. n a von T ehuantepec : K.-K. geol. Reichs., J ah rb., v . 60, p. 215-255, pls. 12, 13. As this species is from the Tampa "Silex CALKINS, W . W., 1878, Catalogue of the Beds", the name tmnpcrensis bas been chosen. ma1·ine shells of Florida, with notes and No.4 Notes on CaJ?c ellariidcte 219

descriptions of several new species: OLSSON, A. A., and R. E. PETIT1 1964, Some Davenport Acad. Nat. Sci., Proc., v. 2, Neogene Mollusca from Florida and the p. 232-252, pl. 8. Ca1·olinas: Bulls. Amer. Paleontology, v. DALL, W. H., 1889, Report on the Mollusca 47, no. 217, p. 505-574, pls. 77-83. (Blake Expedition) ; Part II, Gastropoda: PERRY, GEORGE, 1810-11, Arcana, or the Mu­ Harvard Mus. Comp. Zool., Bull., v. 18, seum of Natural History. London. 84 Report 29, 492 p., 31 pls. pls. (issued in parts, pls. 1-48 in 1810, GRANT, U. S., IV, and H. R. GALE, 1931, 49-84 in 1811). Catalogue of the marine Pliocene and PHILLIP!, R. A., 1848, Testacerorum no­ Pleistocene Mollusca of California and vorum centuria: Zeitschr. f. Malakozool., adjacent regions: San Diego Soc. Nat. yr. 5, p. 13-27. Hist., Mem., v. 1, 1036 p., 32 pls., 5 text SHASKY, D. R., 1961, New deep water mol­ figures. lusks f1·om the Gulf of Califo1·nia: Veli­ LAMARCK, J. B., 1822, Histoire naturelle des ger, v. 4, p. 18-21, pl. 4. animaux sans vertebres, v. 6, pt. 2. Paris. SOWERBY, G. B., (I) , 1832, Characters of p . 1-232. new species of Mollusca and Conchifera, MARKS, J. G., 1949, Nomenclatural units collected by Hugh Cuming: Zool. Soc. and tropical American Miocene species London, Proc., pt. 17, p. 50-61. of the gastropod family Cancellariidae: TUOMEY, MICHAEL, and F. S. HOLMES, 1857, Jour. Paleontology, v. 23, no. 5, p. 453- Pleiocene fossils of South-Carolina. 464, pl. 78. Charleston, S.C., xvi + 152 pp., 30 pls.

December 29, 1967

REVIEWS PROBLEMS IN ENGINEERING SOILS; ATOMIC ABSORPTION SPECTROMETRY IN GEOLOGY HAMILTON M. JOHNSON

PROBLEMS IN ENGINEERING SOILS by P. L. practical. Students in soil mechanics and Capper, W. F. Cassie, and J. D. Geddes, geologists and engineers not engaged in the a new volume in the Spon's Civil Engi­ daily application of soil engineering will neering Series. Published by E. and F. N find this book of great aid as a simplifier, Spon Ltd., London, 1966, vii + 183 p., a refresher, and a fast reference. paperback $3.50, cloth $5.75 . Distributed in the USA exclusively by Barnes and ATOMIC ABSORPTION SPECTROMETRY IN Noble, Inc., New York GEOLOGY by Ernest E. Angino and Gale In the years since Dr. Karl Terzaghi K. Billings, volume seven in the series "fathered" the science of soil mechanics, it Jv[etbods in Geochemistry cmd Geophysics. has advanced through the efforts of engi­ Published by Elsevier Publishing Co., Inc., neers fr01n every part of the world. The New York, 1967, x + 144 p., $11.75 book under review, written by teachers from Evidently the excellent "keys" to content, London, Newcas tle upon Tyne, and Cardiff, i.e., thorough table of contents, extensive continues to broaden the usefulness of the bibliography, carefully prepared index, etc., theory and practice of modern soil me­ of the other volumes of this series arc a chanics. This little book is essentially a result of editorial policy for the same treat­ "problems" book, designed as a companion ment is found here. Fifteen percent of the volume and supplement to a much larger total number of pages is a remarkable total text (the Mechanics of Engineering Soils ) for such data, and yet the ease of search co-2.uthored by the senior two of the present provided is of extremely great value in a authors. The n1aterial covered is that nor­ methods reference book of this type. Users mally encountered in advanced technology of the book will be particularly grateful; and university courses in this subject. The may the policy continue! treatment is thorough with most topics re­ In a time of increasing attention to quan­ ceiving full guiding explanations. The tification of principles and concepts within problems are those which might arise in all phases of the broad field of geology, this field practice and thus the book is extremely series of volumes is beginning to occupy a