i 



iv 



Adams, Arthur, Esq., R.N., F.L.S. &c. puge 



Descriptions of New Species of Eulima, Triphoris, &c., 

 from the Collection of H. Cuming, Esq 276 



Bartlett, Mr. A. D. 



On some Bones of Didus 280 



Bonaparte, Prince Charles Lucien. 



On the largest known Species of Phaleridine Bird . . . 201 



Bonyan, Dr. G. R. 



Notes on the Raptorial Birds of British Guiana .... 53 



Bowerbank, J. S., Esq., F.R.S. &c. 



On the Pterodaclyles of the Chalk Formation .... 14 



Davy, Dr., F.R.S. &c. 



Observations on the Eye of the Mole. (In a Letter to 

 W. Spence, Esq., F.R.S.) 129 



DiLLWYN, L. Llewellyn, Esq., F.G.S. &c. 



On an undescribed Species of iKfejraporfms 118 



DuGuiD, Dr. 



Letter on the Deal Fish. (Communicated by Mr. Yarrell.) 1J6 



Forbes, Prof. Edward, F.R.S. &c. 



On a Species of JEquorea inhabiting the British Seas . . 272 



Gaskoin, J. S., Esq. 



Descriptions of Twenty Species of Columbellcc, and One 

 Species of Cypraa 2 



Gould, John, Esq., F.R.S. &c. 



On a new and most remarkable form in Ornithology . . 1 

 Letter from J. W. G. Spicer, Esq., concerning Two Hybrid 



Birds 61 



On a New Species of Musophaga 93 



On a New Species of the Genus iHfow^rm^iZ/a . . . .114 



On some New Species of Trochilidce 115 



Remarks on the Genus Hapalotis 126 



Descriptions of Two New Species of Mammalia, of the 



Genus Antechinus 284 



Descriptions of a New Species of Ptilotis, and a New Spe- 

 cies of Eopsaltria 285 



