page 

 lately sent home by Capt. Denham, the Commander of the 

 Expedition 1 35 



On Two New Species of Humming Birds belonging to the 

 Genus Amazilius 150 



Gray, George R., F. L. S. and Z. S. 



On a New Species of Pigeon 6 



On a New Species of Lepidopterous Insect 7 



Gray, Dr. John Edward, F.R.S., &c. 



On the Genus Assiminia (Leach) 20 



Description of the Animals and Teeth oiTylodina and other 

 Genera of Gasteropodous MoUusca 41 



On the Position of the Genus Proserpina in the System, 

 and a Description of its Dentition 99 



On the Nucleus of the Operculum of Cydostoma elegans. . 147 



On a Monstrosity of Haliotis (albicans ?) 147 



Notice of some Indian Tortoises (including the Description 

 of a New Species presented to the British IMuseum by Pro- 

 fessor Oldham) 181 



On a New Species of Squirrel (Sciurus macrotis) from Borneo 34 1 



Observations on a Living African Lepidosiren in the Crystal 

 Palace 342 



Description of a New Species of Chelodina from Australia 369 



Hanley, Syltanus. 



Descriptions of Four New Species of KelHadce in the Coi- 

 lection of Hugh Cuming, Esq 340 



Heddle, Robert. 



On a Whale of the Genus Physalus, Gray, captured in 

 Orkney 187 



H0LDSW0RTH, E. W. H., F.L.S., &c. 



Description of a New Species of Actinia from the Devon- 

 shire Coast 1 72 



