1901.] MOLLUSKS mOM THE PERSIAN GULP. 457 



RlKGICtTLA CHARON Hillds. 



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

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

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

 no quantity. 



RiNGiouLA PRISMATIC A Folin {=R. apicata Nevill). 



I. Bombay (Abercrombie). 



Often confused with R. acuta or propinqiians. 



EiNGICULA PROPINQUANS Hiuds. 



P.G. M.C. I. 



This seems the most widely distributed species over the region 

 now treated of. It is particularly abundant in the dredgings 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^. 

 Tethts, sp. (Aplysia). 



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

 2\ argus Riipp. & Leuck., an Erythraean species. 



Fam. Siphon ARiiD^. 



SiPHONARIA BASSEINENSIS Melv. 



I. Bombay {Abercrombie). 



SiPHONARIA KUERACHEENSIS EvB. 



P.G. Eishire. 

 M.C. Grwadur beach. 



SiPHONARIA LECANIUM Phil. 



I. Karachi. 



SiPHONARIA SIPHO Sowb. 



M.C. Gwadur beach. 



Suborder ii. PTEROPODA. 

 Sect, Thecosomata. 

 Fam. Cavoliniid.e. 

 Cavolinia longirostris Less. 



DiACRIA TEISPINOSA LeSS. 



Creseis acicula Rang. 

 Creseis striata Eang. 

 Creseis yirgula Eang. 

 P.G. Gulf of Oman. 

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



