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Ui RARIES SMITHSONIAN INSTITUTION NOIiniliSNi NVINOSHillMS SBIMViJa c/j — - — miiiSNi NviNosHiii^JS S3iijvyan libraries Smithsonian institutic RARIES SMITHSONIAN INSTITUTION NOIinillSNI NVINOSHIIWS SHIHVHa millSNI NVINOSHilkNS S3 1 M VM 9 n~L I B RAR I Es'^SMITHSONIAN'iNSTITUTKI . 1 w i» 2: w 2: ,,. CO ^ « RARIES SMITHSONIAN INSTITUTION NOIinillSNI NVINOSHillMS S3 Id VMS iniiiSNi~'NviNOSHims S3iavdan libraries smithsonian"'institutic~ — 2: r- z > I :o ' CO _ (Si ^ t/) RARIES SMITHSONIAN INSTITUTION NOIiniliSNI NVINOSHillMS S3iyvaa iniliSNI_NVIN0SHlllMs'^S3 I HVH a H^LI BRAR I Es'^SMITHSONIAN^INSTITUTIO CO _ = t/j RARIES SMITHSONIAN INSTITUTION N0UniIiSNrNVIN0SHllWS'"S3 I ^ Vb 3 i 1 i'oVi 0, \5n2"S Published i/iontklv hv tlie New York State Education Department ISrLLETIN 373 MAY iqo6 New York State Museum John ]\I. Clarke Director Bulletin 90 TfiAKHir PALEONTOLOGY •! 4 CEPHALOPODA OF THE BEEKMAN- TOWN AND CHAZY FORMATIONS OF THE CHAMPLAIN BASIN BY RUDOLF RUEDEMANN FAGE PAOK Preface 393 Synoptic table of the distribution Introduction 395 of the Cephalopoda 512 1 Previous investigations 395 Synoptic table of the distribution 2 Sections for reference 397 of some of the genera 513 Terminology 40^ Relations of the cephalopod faunas Order Nautiloidea 404 to the faunas of other regions 513 Species from Philipsburg, Canada 508 Bibliography 527 Synoptic taxonomy of the Cepha- Explanation of plates ... 529 lopoda 509 Index 605 ALBANY NEW YORK STATE EDUCATION DEPARTMENT 1906 Price 75 cents Mpii6m S4-1500 1 STATE OF NEW YORK EDUCATION DEPABTMENT Regents of the University » With years when terms expire igrj Whitelaw Rrid M.A. LL.D. Chancellor _ _ _ New York 1917 St Clair McKelway M.A. L.H.D. LL.D. D.C.L. Vice Chancellor ----------- Brooklyn 1908 Daniel Beach Ph.D. LL.D. ------- Watkins 1914 Pliny T. Sexton LL.B. LL.D. - _ - - _ - Palmyra 1912 T. Guilford Smith M.A. C.p:. LL.D. - - - - Buffalo 1907 William Nottingham M.A. Ph.D. LL.D. - - - Syracuse 1910 Charles A. Gardiner Ph.D. L.H.D. LL.D. D.C.L. New York 1915 Albert Vander Veer M.D. M.A. Ph.D. LL.D. - Albany 191 Edward Lauterbach M.A. LL.D - _ _ - - New York 1909 Eugene A. Philbin LL.B. LL.D. ----- New York 1916 LuciAN L. Shedden LL.B. - _ _ _ - -^ _ Plattsburg Commissioner of Education Andrew S. Draper LL.D. Assistant Commissioners Howard J- Rogers M.A. LL.D. First Assistant Commissioner Edward J. Goodwin I>it.D. L.H.D. Second Assistant Commissioner Augustus S. Downing M.A. Third Assistant Commissioner Secretary to the Commissioner Harlan H. Horner B,A. Director of State Library Edwin H. Anderson M.A. Director of Science and State Museum John M. Clarke Ph.D. LL.D Chiefs of Divisions Accounts, William Mason Attendance, James D. Sullivan Examinations, Chari.es F. Wheelock B.S. LL.D. Lispections, Frank H. Wood M.A. Law, Thomas E. Finkgan M.A. Records, Charles E. Fitch L.H.D. Statistics, Hiram C. Case Visual Instruction. De Lancev M. Ellis Neiv York State Education Department Science Division, October 12, 1905 Hon. Andreiv S. Draper Commissioner of Education My dear sir : I beg to transmit herewith for pubHcation, the manuscript of a bulletin of the State Museum entitled, The Cepha- lopoda of the Beekniantozvn and Chasy Formations of the Cham- plain Basin by Dr Rudolf Ruedemann, Assistant Paleontologist. This work constitutes an important contribution to our knowl- edge of the ancient faunas of New York State and I have explained its bearings somewhat fully in my preface to the paper. Very respectfully yours John M. Clarke Director and State Geologist Approved for publication October 12, 1905 ^J?Z)/1^^^^^ Commissioner of Education New York State Education Department New York State Museum John M. Clarke Director Bulletin go PALEONTOLOGY 14 CEPHALOPODA OF THE BEEKMAN- TOWN AND CHAZY FORMATIONS OF THE CHAMPLAIN BASIN BY RUDOLF RUEDEMANN PREFACE The faunas of the older New York formations have never re- ceived adequate consideration. The invaluable determinations made by Prof. James Hall in the first volume of the Palaeontology of Nezu York were based on the material collected chiefly from the central and western skirts of the Adirondacks during the progress of the geological survey of 1836-43 or brought together from still older collections belonging to private individuals or to the Albany Institute. Although this great work laid the foundation of all our knowledge of these early faunas in America yet as the years passed on its distinguished author realized its incompleteness. The Siluric region of the Lake Champlain basin was then an unopened field to the paleontologist. The profusion of its fossil remains, vv^hich far exceed in abundance those of the region from which the origi- nal collections were assembled, was not recognized and it was not till the later years of Professor Hall's long life that explorations in this basin began to reveal the inadequacy of his early work. It was one of his unrealized purposes of this later period to revise and amplify the volume referred to. Though it did not fall to him to see this important work executed yet he may be credited with having initiated the undertaking. Explorations having for their end a more exact knowledge of the stratigraphy of the region were inaugurated by him and at his instance Professors J. F. Kemp and H. P. Gushing commenced their study of the geology of Essex and 394 NEW YORK STATE MUSEUM Clinton counties which have now been so fruitful in setting forth with clearness the relations and extent of the lower formations. Somewhat earlier than this Professors Brainerd and Seely of Mid- dlebury College, Vermont^ had exhumed and R. P. Whitfield had described the rich fauna of the Beekmantown formation at Fort Cassin Vt. and this work gave a new impetus to investigations of the faunas on the New York side of the Lake Champlain basin. During the period from 1890 onward, collecting was done here for the State Museum in a desultory way by Dr Carl Rominger and Jacob Van Deloo but it was not until 1899 that the acquisition of fossils was taken up seriously by the State Paleontologist. At that time Mr Gilbert van Ingen entered the field, carrying on operations in a systematic and refined manner. He was thereupon joined by Dr Ruedemann who has since continued the work alone. The result of these operations for several seasons has been the acquisi- tion of very extensive collections upon which the present work is chiefly based. Meanwhile some writings have appeared which bear upon the composition of these faunas ; we may note especially a recent paper issued in the Report of the State Paleontologist for ipo^ by Prof. George H. Hudson on Cliazy fossils from Valcour island and a treatise on the trilobites of these rocks by Percy E. Raymond. The present work deals exclusively with the cephalo- pod fauna of the Beekmantown and Chazy formations of the Cham- plain valley. The study of these objects involves peculiar difficulties, their preservation is not always good, the determinations of their organic relations have been rendered somewhat complicated by recent labors on fossil cephalopods and yet being the most highly organized mollusca at this period of the earth's history and of primary importance in determining the stratigraphic values of the formations concerned, the unraveling of their ontogeny and genetic relations constitutes a. definite advance in New York paleontology. In the preparation of this work the author has received utmost consideration from coworkers in this field and makes acknowledg- ment especially to Prof. H. M. Seely of Middlebury College, Prof. G. H. Perkins of Burlington University and Prof. G. H. Hudson of Plattsburg, to Dr J. F. Whiteaves of Ottawa, Dr F. D. Adams of Montreal" and Prof. R. P. Whitfield of New York for the opportunity to consult the collections in their charge, and to Dr F. W. Sardeson of ]\Iinneapolis and INIr R. S. Bassler of Washington for the loan of specimens. John M. Clarke State Paleontologist BEEKMANTOWN AND CHAZY FORMATIONS OF CHAMPLAIN BASIN 395 INTRODUCTION •I Statement of previous investigations The status of our present knowledge of the Cephalopoda of the Champlain basin may be understood from the following data.^ Hall has described in his volume i of the Palaeontology of Nezv York two species of cephalopods from the Beekmantown limestone, both from small fragments, showing neither siphuncle nor living cham- ber, and one only the surface ; and four species from the Chazy limestone, from but one of which the siphuncle is known, from another only the surface and from the remaining two only acci- dental sections. On the other hand, Billings has distinguished no less than 49 cephalopods from the Beekmantown formation of Newfoundland, Quebec and Philipsburg,^ only a small number of which have been figured, and has also added lO species of Chazy limestone cepha- lopods to the five made known by Hall. Barrande also has made us acquainted with six species from the Beekmantown formation of Canada and Newfoundland and Whit- field has carefully described' and well illustrated an excellently pre- served upper Beekmantown limestone fauna from Fort Cassin in Vermont, but unfortunatelv has, under the misapprehension that the beds were of the age of the Lowville (Birdseye) limestone, com- pared them rather with Trenton limestone forms than with Billings's Beekmantown limestone species.