160 PROCEEDINGS OP THE ACADEMY OF 



castaneiceps. The principal external specific character is, that upon the top 

 of the head there exists a circular patch of reddish hairs ; the hairs covering the. 

 belly, in the original specimen, were thick and long, and the hairs of the fore- 

 arm were retroverted ; the skull presents important differences from that of 

 the ordinary gorilla. 



April lbth, 1862. 

 Mr. Lea, President, in the Chair. 



Thirty-nine members present. 



The following papers were presented for publication : 



On the Classification and Synonymy of recent species of Pho- 

 ladidre, by George W. Tryon, Jr. 



Description of a new genus (Trypanostoma) of the family Melanidse, 

 and of forty-five new species, by Isaac Lea. 



On Neosorex albigenis, and on Lacerta echinata and Tiliqua dura, 

 by E. D. Cope. 



Which were severally referred to Committees. 



April 223, 1862. 

 Mr. Lea, President, in the Chair. 



Forty members present. 



The following papers were presented for publication : 



Descriptions of two new species of Vespertilionidae, by Harrison 

 Allen, M. D. 



Catalogue of North American Mollusca in the collection of the Acade- 

 my, by W. G. Binney, and G. W. Tryon, Jr. 



On a New Genus of Fishes allied to Aulorhyncus, etc. ; Pieinarks on 

 the relations of the Genera and other groups of Cuban Fishes ; and 

 Catalogue of the Fishes of Lower California, in the Museum of the 

 Smithsonian Institution, by Theodore Gill. 



Description of ten new specie's of Unionidre, etc., and Descriptions 

 of two new species of Exotic Uniones, etc., by Isaac Lea. 



Contributions to Neotropical Saurology, by E. D. Cope. 



Which were severally referred to Committees. 



April 2Vlh, 1862. 

 Mr. Lea, President, in the Chair. 



Thirty-three members present. 



Dr. Leidy presented a paper entitled 



Notes upon the Descriptions of new plants from Texas, by. S. B. 

 Buckley, etc., by Asa Gray, which was referred to a Committee. 



On report of the respective Committees, the following papers were 

 ordered to be published in the Proceedings. 



[April, 



