34 [April, 



ing of the Society, for the excellent manner in which they discharged 

 their duties. 



On motion of Mr. Lea, the thanks of the Society were also ordered to 

 be presented to the Trustees of the University, for the use of the Hall 

 on the evening of the 20th inst. 



ELECTION. 



Mr. Clayton T. Piatt, Mr. Jas. Engle Negus and Constant Gillou, 

 Esq., of Philadelphia, were elected Members. 



April \.ih. 

 Vice-President Bridges in the Chair. 



Letters were read, 



From the Society of Natural History of Cherbourg, dated 28th Oct. 

 1853, transmitting the 1st vol. of its Memoirs, and asking an exchange. 



From the Scientific Commission of the Zoological Garden of Amster- 

 dam, dated Nov. 1843, transmitting its Memoirs. 



From the Trustees of the New York State Library, dated Albany, 22d 

 March, 1854, acknowledging the receipt of the Proceedings to complete 

 vol. 6, and No. 1, vol. 7. 



From Prof, Haldeman, addressed to the Corresponding Secretary, 

 dated Columbia, Penn., 29th March, 1854, as follows : 



" I find that the Limnadella described by Mr. Girard, Proceed. Acad. vol. 7, 

 page 3, is my Limnadia coriacea, ib. 1, 184, for June, 1842. At that time I 

 doubted the propriety of placing it in Limnadia, chiefly on account of the dorsal 

 tubercles mentioned in my description, but I had no means of making the neces- 

 sary comparisons. It was discovered in great abundance in a road-side puddle, 

 subject to desiccation, and although I removed a number of them to a small pond, 

 I have never met with them since." 



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

 entitled " Synopsis of the species of Platynus and allied genera, inhabit- 

 ing the United States." Referred to Dr. Leidy, Dr. Zantzinger and 

 Mr. Foulke. 



A paper was presented for publication in the Proceedings, entitled 

 " Descriptions of new species of North American Ranaefortnes and Hy- 

 laeformes in the Museum of the Smithsonian Institution, by Spencer 

 F. Baird." Referred to Dr. Hallowell, Dr. Le Conte and Dr. Leidy. 



On motion of Mr. Yaux, it was Resolved, That a complete set of the 

 Publications of the Academy be forwarded to the Portland Society of 

 Natural History, Portland, Maine. 



April Will. 

 The President, Mr. Ord, in the Chair. 



A letter was read from the Academy of Naturalists of Breslau, dated 

 18th Nov. 1853, acknowledging the receipt of the Proceedings, vol. 6, 

 Nos. 3 8, and of Journal No. 3, vol. 2, new series. 



Also a letter from Geo. W. Carpenter, Esq., dated April 11th, 1854, 

 presenting a copy of Livingston's Memoirs of eminent Americans. 



