90 AMERICAN JOURNAL 



Descriptions of seven neio species of Australian Land Shells. 

 By James C. Cox, M. D. 



Helix dridornni. Helix splendescens. 



" jinsculus. " nautiloides. 



" Urarensis. Vitrina ])lanilahris. 

 " Greenhilli. 



Descriptions of Two New Species of 31arine Bivalve Shells, 

 from South Australia. By George French Angas. 



Barhatia laminata. Sjyisula Adelaidce. 



Descriptions of a New Genus and some Neio Species of Mol- 

 lusks. By IlbNRY Adams. 



Blacron Wrightii, Coast of Patagonia. 

 Hglisia Macandrece, Gibralter. 

 Amphithalamus obesus, Lord Hood's Island. 



" jyupoidcus, " " 



Heterocardia Dcnnisoni, Loc. ? 

 Thyella., (new genus, closely allied to Scmele.) 

 TJiydla pulchra, Singapore. 



Mac7'on, hitherto considered a subgenus of Pseudoliva, is now 

 separated as a distinct genus, as its operculum is unguiculate, 

 while that of l^seudoliva is purpuroid. 



Descriptions of Thirteen Neio Species of Land Shells from 

 Formosa, in the collection of the late Hugh Cuming, col- 

 lected by Mr. Robert Swinhoe, Vice- Consul of that Island. 

 By Dr. Louis Pfeiffer. 



Helix Vesta. Helix mellea. 



" Shermani. Bulitnus Swinhoei. 

 " Granti. " spha^roconus. 



" Siuinhoei. " incertus. 



" Formoscnsis. Clausilia Swinhoei. 

 " bacca. " Sheridani. 



Pterocyclos Wilsoni. 



Descriptions of Five Neiv Species of Land Shells from th& 

 collection of the late Hugh Cuming. By Dr. Louis 

 Pfeiffer. 



Bulimus auris, Venezuela. Pseudachatina elongata, Gaboon 

 " temiilabris, " Eiver. 



" Juarezi, Mexico. Achatina Calabarica, Old Cala- 

 bar. 



