OF CONCHOLOOY. 377 



On the Marine Molluscan Fauna of South Australia, with 

 a List of all the Species known up to the present time ; 

 together with Remarks on their Habitats and Distribu- 

 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 bathy metri- 

 cal distribution. 281 species, in all, are enumerated. 



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



Diagnoses of New Forms of Mollusca from the Vancouver 

 District, by philip p. carpenter. 



Terebralula unguicula. Saxidomus brevisiphonatus. 



Darina declivis. 



A new subgenus, Nettastomella, is formed for Phohis 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 penita. v 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 Netastomella: " Pholadidea; 

 valvis postice in calyceni testaceum planatum prolongatis ; 

 calyce coriaceo nullo." 



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

 Lake Nyassa, Eastern Tropical Africa, collected by John 

 Ivirk, M. D., &c. by dr. h. dohrn. 



Streptaxis Kirkii. Lanisles Nyassanus. 



Ennea laevigata, Melania nodicincta. 



Buliminus Kirkii. " Victorise. 



Diagnoses of Netu Species and a New Genus of Mollusks 

 from the Reigen Mazatlan Collection; with an Account 

 of Additional Specimens presented to the British Museum. 



BY PHILIP P. CARPENTER. 



Cycladella, N. Genus, (Kelliadvef) 

 Cycladella papyracea. Diala paupercula, C. B. A dams. 



Montacuta obtusa. Mangelia sulcata. 



Scissurella rimuloides. Mucronalia involuta. 



Vitrinella ornata. Leiostraca producta. 



" tenuisculpta,. 



