1854.] 15 



February ItJi. 

 Mr. Lea, Vice-President, in the Chair. 



Letters were read : 



From the Natural History Association of Halle, acknowledging the 

 receipt of the Proceedings, vol. 6, No. 6, and transmitting the volume of 

 Memoirs of that Society, announced this evening. 



From the Trustees of the New York State Library, acknowledging 

 the receipt of the Proceedings, vol. 6, No. 12. 



From Mrs. M. K. Wetherill, dated Philadelphia, Feb. 1st, 1854, 

 acknowledging the receipt of a copy of the Resolution adopted Dec. 27, 

 1853. 



From Dr. W. P. Gibbons, Corresponding Secretary of the California 

 Academy of Natural Sciences, dated San Francisco, Dec. 31, 1853, ac- 

 companying the botanical specimens presented this evening. 



Mr. Lea read a paper entitled " Rectification of Mr. T. A. Conrad's 

 Synopsis of the Family of Naiades of North America, published in the 

 Proceedings of the Acad. Nat. Sciences of Philadelphia, February, 1853." 

 Referred to Dr. Leidy, Prof. Haldeman and Dr. Wilson. 



February 21st. 

 Vice-President Bridges in the Chair. 



Letters were read : 



From Lieut. D. M. Couch, U. S. A., dated Washington, Feb. 7th, 

 1854, acknowledging the receipt of his notice of election as a Corres- 

 pondent, 



From the Imperial Society of Naturalists of Moscow, dated October 

 6th, 1852, transmitting the numbers of the Balletin of that Society an- 

 nounced this evening. 



From M. Vauquelin, dated Paris, Aug. 20th, 1853, transmitting a 

 pamphlet on the subject of certain instruments, and a new suture for 

 the treatment of Ectropion, invented by him. 



The Corresponding Secretary read from the Placer Times and Tran- 

 script, (published at San Francisco,) Jan. 14th, 1854, an extract from 

 the Proceedings of the California Academy of Natural Sciences, claim- 

 ing priority of description of viviparous fish inhabiting the Bay of San 

 Francisco, for Dr. Wm. P. Gibbons. Dr. Gibbons proposes the generic 

 name Holconote, and for one species H. Agassizi. For another species 

 the California Academy proposed H. Gibbonsensis. 



Dr. Le Conte presented a paper for publication in the Proceedings, 

 entitled " Descriptions of some Coleoptera from Oregon, collected 

 by Dr. J. G. Cooper, &c, &c. j" and also a second paper entitled 

 " Synopsis of the (Edemeridag of the United States ;" both of which 

 were referred to Dr. Zantzinger, Prof. Haldeman and Mr. Cooke. 



