1901.] HOLLUSKS FROM THE PERSIAN GULF. 457 



RlXGICTTLA CHARON Hinds. 



M.C. Gwadiir (W. T. Blanford, Journ. As. Soc. Beng. xliv. 

 2, p. 102). It is nearly allied to R. acuta Phil. (cf. Pilsbry, Man. 

 Conch, xv. p. 407). In the Townsend collection it occurs, but in 

 no quantity. 



Eixgicula peismatica Folin ( = R. apicata Ncvill). 



I. Bombay (Abercrombie). 



Often confused with R. acuta or propinquans. 



Bingicula propinquans Hinds. 

 P.G. M.C. I. 



This seems the most widely distributed species over the region 

 now treated of. It is particularly abundant in the dred°;iug3 in 

 the Gulf of Oman (50-300 fathoms), and occurs plentifully at 

 Bombay (Abercrombie) in shell-shingle. Young examples are 

 transversely striate, adult specimens worn nearly smooth. 



Fam. Apltsiid.e. 

 Tethts, sp. (Aplysia). 



I. Karachi, under rocks at low tide. May perhaps be the 

 T. arr/us Riipp. & Leuck., an Erythraean species. 



Fam. Siphon ariid;e. 



SlPHONARIA BASSEINENSIS Melv. 



I. Bombay (Abercrombie). 



SlPHONARIA KURRACHEENSIS Eve. 



P.O. Eishire. 



M.C. Gwadiir beach. 



SlPHONARIA LECANIUM Phil. 



I. Karachi. 

 Siphonaria sipno Sowb. 

 M.C. Gwadur beach. 



Suborder ii. PTEROPODA. 

 Sect. Thecosomata. 

 Fam. Cavoliniidje. 



Cavolinia loxgirostius Less. 

 DlAGBLA TKIsiM.N'tsv \jrs<. 

 ( 'i:i>u< IdOULA Bang. 

 ( SSEBBIfl BTBJ \ta Rang. 



bib 1 1 i.'.ii.a Bang. 

 P.O. Gulf of Oman. 

 PBOO. Zool. Soc— 1901, Vol. II. No. XXX. 30 



