X 



Page 

 Owen, Richard, Professor. 



On the Anatomy of the Aye-aye. Part I. (Abstract) . . 11 



. Part II. (Abstract) . . 13 



Parker, W. K. 



Abstract of a Memoir on the Osteology of the genera Pte- 

 rocles, Syrrhaptes, HemipodiuSy and Tinamus 253 



Pease, W. Harper. 



Descriptions of Two New Species of Helicter {Achatinella, 

 Swains.), from the Sandwich Islands, with a History of the 

 Genus 3 



Description of a New Genus of Marine Shells from the 

 Sandwich Islands 240 



Descriptions of New Species of Marine Shells from the 

 Pacific Islands 240 



Descriptions of New Species of Shells from the Pacific 

 Islands , 243 



Description of New Species of Marine Shells from the Pa- 

 cific Islands 278 



Pfeiffer, Dr. L. 



Descriptions of Eight New Species of Cyclostomacea, from 



the Collection of H. Cuming, Esq 115 



Description of a New Species of Helix (Nanina) 117 



Descriptions of Thirty-six New Land Shells, from the Col- 

 lection of H. Cuming, Esq 268 



POWERSCOURT, ViSCOUNT, F.Z.S. 



Exhibition, through Mr. Eraser, of an enormous pair of 

 Antlers with forty-four points 142 



Prime, Temple, of New York. 



Descriptions of Three New Species of Shells belonging to 

 the Family of Cyclades 2 



