290 PROCEEDINGS OF THE ACADEMY OF 



Dr. E. B. Vandyke, and Mr. Frank H. Wyeth were elected members, 

 and iMr. Gabriel Manigault, of Charleston, S. C, was elected a corres- 

 pondent. 



October 2d. 

 The President, Dr. Hays, in the Chair. 



Twenty- eight members present. 



The fallowing were offered for publication : 



" Oo the Period and Ritio of the Annual Increase in the Circum- 

 ference of Trees." By Thomas Meehan. 



" Third Contribution to the History of the Balaenidae and Delphin- 

 idse." By E. D. Cope. 



October 9(h. 



The President, Dr. Hays, in the Chair. 

 Twenty two members present. 



October lQth. 

 The President, Dr. Hays, in the Chair. 



Twenty-eight members present. 



The following was offered for publication : "Synopsis of the Batrachia 

 ,and Ileptilia of Arizona." By EJ. D. Cope. 



Dr. Slack exhibited some living specimens of Menopoma, from the up- 

 per Alleghany River, and remarked that in the summer they appear of 

 a light slate color; in the winter, dark brown. 



October 23(7. 



The President, Dr. Hays, in the Chair. 

 Thirty members present. 



Dr. Leidy exhibited a tusk, fragments of others, and molar teth of Mastodon 

 ohioticus from Big-bone-lick, Kentucky, belonging to the Museum. The spe- 

 cimens exhibited a remarkable degree of attrition, in various positions, which 

 he supposed to be due to their having been ground in and by moving masses 

 of ice. 



Mr. Cope made a communication in regard to the Mesozoic Sandstone of 

 Pennsylvania, expressing the probability of its horizon being that of the Trias 

 of Europe, on account of some contained vertebrate remains which he had 

 previously described, and also from some bones of a Pterodactyle now in his 

 possession, for which he proposed the name of P. longizpinis. 



Mr. Cassin made some remarks in regard to the existence of deposits in the 

 vicinity of Atlantic City, N. J., analogous to the Kitchen Middens of Northern 

 Europe aud similar to those noticed by Dr. Leidy, near Cape Henlopen, Dtl. 



Mr. Ennis reported the existence of a similar shell bed near Cape May Court 

 House, N. J. 



Dr. Leidy observed that during the past summer he had made another visit 



to the Kitchen Middens of Cape Henlopen, in company with Mr. Cassin, Mr. 



; Robert Frazer, and Mr. ^Canby of Wilmington. They bad noticed the shell 



[Oct. 



