ACADEMY OF NATURAL SCIENCES. 155 



Arts for March, 1864, from the editors. Observations on the 

 Genus Unio, by Isaac Lea, L.L.D., Vol. 10. How to collect 

 and observe Insects, by H. S. Packard, Jr. Plants of Buffalo, 

 N. Y. and its vicinity, by G. W. Clinton. Bulletin of the Museum 

 of Zoology of Cambridge, Mass. pp. 29 — 60. Report of contribu- 

 tions to the Pennsylvania Belief Association for East Tennessee. 

 Proc. of the Acad. Natural Sciences of Philadelphia fron> October 

 to December, 1863, and January and February, 1864. Contribu- 

 tions to the Physics, etc. of the Sacramento River, by Thos. W. 

 Logan, M.D., extracted from the Pacific Medical and Surgical 

 Journal, Vol. 7, 1864, — from the author. 



Regular Meeting, June 20th, 1864. 

 President in the Chair. 



Eleven members present. 



C. W. M. Smith and Dr. McClure, of Redwood City, were 

 elected resident members. 



Donations to the Cabinet : A large crab, from the west coast of 

 Mexico, by G. 0. Haller, through Dr. Cooper. 



Donations to the Library : Report of the Smithsonian Institution 

 for 1862. 



Adjourned Meeting, July 11th, 1864. 



Dr. Trask in the Chair. 



Seven members present. 



The following paper was received from the author, in accordance 

 with the proposition accepted by the Academy Dec. 7th, 1863. 



Descriptions of New Marine Shells from the Coast of Califor- 

 nia. 



PART I. 

 BY PHILIP P. CARPENTER, B.A., PH.D. 



Corresponding Member of the Academies of Philadelphia and California, etc. 



Warrington, England, May 4th, 1864. 

 The shells to be described in these papers were collected by Dr. J. G. Cooper, 



