191 



and Philosophical Society of Manchester, presenting its Memoirs, Sd 

 Series, Vol. i., Proceedings, Vol. ii., and Rules of the Society. From 

 the Natural History Society of New Brunswick, St. John, October 

 22d, 1862, desiring an interchange of publications, and presenting a 

 copy of its Regulations and By-Laws ; the Entomological Society, 

 London, November 19th, 1862, offering its publications to the Society. 

 From Mrs. Margaret M. Q. Greene, Boston, November 22d, 1862, in 

 response to a letter communicating the • resolutions adopted by the 

 Society on the occasion of the decease of the late Dr. B. D. Greene ; 

 and from Edward D. Cope, Esq., Philadelphia, Dec. 19th, 1862, in 

 acknowledgment of his election as Corresponding Member. 



Messrs, Geo. H. Richards, Francis Gorham, M, S. Scudder 

 and J. S. Blatchford, were elected Resident Members. 



January 21, 1863. 



The President in the chair. 



Dr. J. C. White was chosen Seci-etary pro te'tnpore. 

 A jDaper from Dr. Wra. Stimpson was presented, entitled, 

 "The Fossil Crab of Gay Head." 



, Prof Agassiz made a few remarks about the enigmatic fossil which 

 has been lately discovered at Solenhofen ; and, after passing in review 

 the opinions of Owen, of Meyer and of Wagner concerning the nature 

 of the animal, he inclined to the belief that this was but an additional 

 case of a synthetic type such as he had at first pointed out among 

 fishes, where there were fishes with reptilian characters. In this case 

 it was a synthetic type of a higher class — a reptile with bird charac- 

 ters. 



Mr. A. Agassiz made a few remarks about the geographical distri- 

 bution of the Sea Urchin of Massachusetts Bay, the Echinus granula- 

 ris of Say. He said that he had carefully compared it with specimens 

 of the Toxopneustes drobachiensis Ag. of Norway, sent by Prof. 

 Sars to Prof. Agassiz, and had not been able to discover any specific 

 differences. Liitken had pointed out the identity of the Echinus 

 which inhabits the shores of Greenland and the Toxopneustes drobachi- 

 ensis. Mr. Agassiz had besides occasion to examine the collection of 

 Echini brought home by Mr. Stimpson from the North Pacific Ex. Ex., 

 among which there were specimens of Toxopneustes drobachiensis from 

 Petropaulsky and Behring's Straits. Those he had carefully compared 



