OF CONCHOLOOY. 377 



On the Marine Molluscan Fauna of South Australia, tenth 

 a List of all tlie Sj'iecies known np to the present time ; 

 together icith Remarks on their Habitats and Distrihu- 

 tion, &C. BY GEORGE FRENCH ANGAS. 



This is a very complete paper of 45 pages, giving the syn- 

 onymy of the species and their geographical and bathymetri- 

 cal distribution. 231 species, in all, are enumerated. 



List of Mollusks collected by Mr. R. Sioi7iehoe in Formosa. 



Diagnoses of Xew Forms of Mollusca from the Vancouver 

 Lkstrict. BY PHILIP P. CARPENTER. 



Tereoratula unguicula. Saxidomus brevisiplionalus. 



Darina declivis. 



A new subgenus, Ndtastomella, is formed for Pholas Dar- 

 winii, Sowb., which inhabits Vancouver, San Diego, and Mon- 

 terey, California, as well as the supposed original locality, 

 Chili. Mr. Carpenter remarks, that "we had probably not 

 seen a specimen of this species, else we could hardly have 

 placed it in the synonymy of Pholadidea j^nita.^^ He is cor- 

 rect in his supposition; our judgment was made up from the 

 imperfect figure of Sowerby's Monograph and the description. 

 We gracefully yield the point. 



The following is the diagnosis of lietastomella: '^Pholadidea; 

 valvis postice in calycem testaceum plauatum prolongatis ; 

 calyce coriaceo nullo." 



List of the Land and Fresh-water Shells of the Zambesi and 

 Lake A'yassa, Eastern Tropical Africa, collected by John 

 Kirk, M. I)., &C. BY DR. H. DOHRN. 



Streptaxis Kirkii. ' Lanistes Nyassanus. 



Ennea Isevigata, Melania iiodicincta. 



Buliminus Kirkii. '' Victorise. 



Diagnoses of Neiu Species and a Neio Genus of Mollusks 

 from the Reigen Mazatlan Collection; with ari Account 

 of Additional Specimens presented to the British Museum. 

 BY PHILIP P. CARPENTER. 



Cycladella, N. Genus, {KelliadosP) 

 Cycladella papyracea. Diala pauper cula, C.B.Adams. 



Montacuta obtusn. " Mangelia sulcata. 



Scissurella rimuloides. Mucronalia involuta. 



Vitrinella ornata. Leiostraca producta. 



" tenuisculpta. 



