351 



of Colossochelys atlas, which must have been of an im- 

 mense size. With reference to this, Prof. Agassiz observed, 

 that he had found at Philadelphia a femur of a gigantic 

 turtle, taken from the green sand of New Jersey, which he 

 thinks must have been larger than the Himalaya species, 

 judging from the size of the femur, which was larger than 

 that of the rhinoceros ; he had named it Ailantochelys. 



Letters from Dr. Warren, Hon. Abbott Lawrence, and 

 Mr. Charles Konig of the British Museum, were read by 

 the Secretary, in reference to this donation and the 

 exchange of specimens. 



The thanks of the Society were voted to the Hon. East 

 India Company for this very valuable donation, and to the 

 Hon. Abbott Lawrence, and to Sir John Richardson for 

 their kind offices and aid in securing it for the Society. 



Dr. C. T. Jackson presented, in the name of Mr. Charles 

 HofTman, of Salem, a skull of a Hippopotamus, from the 

 river Nunez, West Africa. Referred to Dr. Wyman. 

 The thanks of the Society were voted for this valuable 

 donation. 



A letter from M. Vattemare was read by the Secretary, 

 announcing the donation of '' Catesby's Natural History of 

 Florida," &,c. for the use of the Society, and requesting its 

 promised specimens. 



Dr. C. T. Jackson presented to the Society a copy of his 

 Report on the Mineralogy and Geology of the Mineral 

 Lands of the United States in Michigan, printed under a 

 Resolve of Congress. 



Dr. Gould exhibited the Ixodes mentioned by him as 

 having been mistaken for a tumor ; and gave a description 

 of its apparatus for retaining its firm hold of the skin. 

 From this description. Prof. Agassiz thought the species 

 described by Miiller, was quite different. 



Mr. Desor exhibited Prof. Vogt's new classification of 

 the animal kingdom in his new text-booJc of Zoology, as 

 follows : — 



