1896.1 NEW YORK ACADEMY OF SCIENCES. 143 evolution along determinate lines as the skeleton, and yet it is well known that they do not improve by use, but rather deterio- rate. Thus the explanation is not one which satisfies all cases, but it does seem to meet, and to a certain extent undermine, the special cases of evidence of the inheritance of acquired charac- ters, collected by Professor Cope in his well-known papers upon this subject. HARRISONG. DYAR,Secretary pro. tern., ' (per C. L. B.)

STATEDMEETING. March 14th, 1896. The Academy met with President STEVENSONin the chair; twelve persons present. The minutes of the previous meeting were read and approved. The following nominations for resident membership were re- ceived and referred to the Council: Mr. Louis C. Whiton. 114 West 76th St. ; Mr. Wm. F. Havemeyer, 29 West 19th St. ; Prof. J. Dyneley Prince, 19 West 34th St.; Prof. Charles B. Bliss, University Heights, New York; Prof. Lawrence A. McLouth, University Heights, New York; Dr. Emil Leytter, 305 West 127th St. ; Pro€. F. H. Giddings, Columbia University. The Section of Geology and Mineralogy then organized. The first paper of the evening was by Mr. Heinrich Ries, on

(( A Visit to the Bauxite Mines of Georgia and Alabama." Mr. Ries described the geological relations of the bauxite deposits of the region, basing his remarks on notes taken last October. The paper was illustrated by numerous lantern views and speci- mens and was discussed by Messrs. Dodge and Kemp. The second paper of the evening was by Prof. R. E. Dodge, on the " Cretaceous and Tertiary Peneplains of Eastern Ten- nessee," on the basis of observations accumulated during two ' summers' field work in the region under Mr. C. W. Hayes, of the U. S. Geological Survey. The speaker described the geo- 144 TRANSACTIONS OF THE [MAR. 14,

graphic development since the Cretaceous period of the country lying west from Chattanooga across the Sequatchie valley to the Mississippi river. The Cretaceous and Tertiary peneplains were illustrated by means of maps and sections, and the present cle- velopnient of the drainage system was traced out. President Stevenson, in discussing the subject, described his own observa- tions in West Virginia and western Pennsylvania. The Section then proceeded to the election of officers for the ensuing year : Professor J. J. Stevenson was chosen Chairman and Professor J. F. Kemp, Secretary. The Academy then adjourned. J. F. KEMP,Secretary.

ON THE OCCURRENCE OF CIRRIPEDES IN THE CAMBRIAN ROCKS OF NORTH AMERICA. BY G. F. MATTHEW. In a revision of material collected from the Cambrian rocks of Canada and Newfoundland, the author has investigated some peculiar calcareous plates which occur at several horizons ; as a result he has come to the conclusion that these are the scattered tegumentary plates of animals relate'd to the barnacles. These plates are of various forms, but the majority agree in having a carina, usually nearer one side than the other. From the fact that the plates are depressed on one side of the carina and elevated on the other, it may be inferred that they are parts of imbricated series. Occasionally plates are found which are convex on both sides of the carina ; such plates are more sym- metrical than the others. The above plates differ from Plumulites of Barrande in being comparatively smooth, the only sculpturing of the surface being delicate growth lines near the lower margin. Beside the above plates there are other plates marked by sharply raised, closely set ridges, parallel to the lower margin. Some of these agree perfectly with Barrande's Plumulites, others are more arouate, others still have more distant growth ridges, etc. Such is the variety of form in the smooth plates that it is highly probable that more than one species (perhaps more than one genus) is represented. But as the plates found were de- 1896.1 NEW PORK ACADEMY OF SCIENCES. 145 tached from each other, and scattered over layers of the shale, it is quite impossible to determine this point. For the smooth plates I would suggest the name Cirripodites. One of these plates and B Plumulites are figured below.

Y 2 I 1. Plzomclifes illic~ruelei~sis,Mag f. From the subzone of Paradoxides Davidis, Manuel Brook, Newfoundland. 2. Cirripodites Acadicus, triangular form, Mag. f. From the subzone of P. Eteminicus, St. John, N. B., Canada. All the plates so far found belong to the Paradoxide Zone. In America this zone contains four subzones, viz. : 1. Suhzone of P. lamellatus (cf. (Elandicus). 2. 'L " P. Eteminicus (cf. rugulosus). 3. (' " P. Abeuacus (cf. Tessini). 4. " " P. Davidis (the highest subzone). In Sweden there are two higher subzones in the Paradoxides beds. Plates of Cirripedes have been found in the second and fourth subzones ; and certain fossils which probably are of this type of crustacean, from the third subzone. The fossils from the several subzones differ so far as to show that they are probably of differ- ent genera. A fuller account of these interesting fossils will be given in an article which the author has in preparation, on the Fauna of the Paradoxides Zone in America. In reference to the use of the generic names given above, a few words may be said. Apparently there has been a diversity of practice in the use of terms to designate these fossils. Dr. Henry Woodward" argues for the use of Turrilepas as against Plumulites, on the ground of priority of publication. Barrande first found Plumulites in the Ordovician rocks (Etage D.) of Bohemia, whereas Dr. .Woodward's Turrilepas came from the Silurian, and it seems altogether probable that they are dif- ferent genera. Dr. H. M. Ami has found plates in the Utica beds near Ot- tawa, which very closely resemble some of Barrande's figures ; * Geolog. Mag. London, New Ser. Dec. iii., vol. vi., p. 272. TRANSACTIONSN. Y. ACAD.SCI., Vol. XIV., Sig. 10, June 2,1896. 146 TRARSACTIOKS OF THE [MAR. 30, and in the collections of Coliimbia College, New York, there are plates from the same horizon at Plattsburg, N. Y., having the form and markings of Plumulites. In view of the very diverse types of Cirripedes figured by Dr. J. M. Clarke,” in vvhicli tlie individual plates sliom no greater diversity of form than those called Plumulites by Barrande, it seems to me quite within the range of convenient use to utilize this term of Barrande for detached, corrugated plates of Cirripedes of the Ordovician and earlier time. Perhaps a fortunate happening of discovery shall before long enable us to relegate certain of them to a more defi- nite genus, ST. JOHN,N. B., CANADA,Jfarch, 1896.

REGULARPUBLIC LECTURE. March 23d, 1896.

The Academy met in the Law School of Columbia University to listen to the regular public lecture for the month. Professor STEVENSONpresided, and about 350 people were present. Before the lecture began tlie following two names were pre- sented for resident membership and referred to the Council in the regular course : Nr. A. S. Frissell, Mr. Thaddeus R. White. President STEVENSONthen introduced Professor M. I. Pupin, who delivered the lecture on “ Roentgen’s Discovery” and illns- trated his remarks by experiments and the lantern. At the close of the lecture a vote of thanks mas given the lecturer. The Academy then ailjonrned. J. F. I(EJlP, Secretary.

STATEDMEETING. March 30th, 1896. The Academy met and listened to an address by the retiring President, Professor J. K. Rees, upon the subject “ Some Prob- lems About to Confront Astronomens of the Twentieth Cen-

*Am. Geologist, vol. xvii., No. 3, p. 143.