1901.] MOLLUSKS FROM THE PERSIAN GULF. 391 



being two such spiral threads, one in the middle, the other towards 

 the base. The peristome is quite or almost continuous, columella 

 white, strongly one-plaited. 



This species differs, also, from all forms of the somewhat protean 

 IS. cinctella Ad. in its slight ventricosity and more elegant attenu- 

 ations of whorl, the body-whorl, especially, being broader in the 

 commoner species. 



Syrnola metria Melv. 



P.G-. Bushire. 



I. Karachi. At low tide amongst mud, weeds, and loose 

 rocks. 



Very near some large forms of Odostomia, this species has, so 

 far, been found but very rarely. 



OSCILLA INDICA Mclv. 



I. Bombay (Abercrombie). Karachi. 



The commoner species of the two Oscillce, found in the same 

 localities, but always distinguished by its oblongo-fusiform shape. 

 Reported from Aden by Commander Shopland. 



OsciLLA TORNATA (A. Ad. incdit.) Melv. 



I. Bombay (Abercrombie). Karachi. Amongst muddy rocks 

 at low tide. 



Amathis filia Melv. 



I. Bombay {Abercrombie). Eare always ; in shell-sand. 



Eltjsa brunneomaculata Melv. 



P.G. Dredged in 5 fathoms, mud and sand. Grulf of Oman : 

 Malcolm Inlet (Kubbatt Ghazira), 24 fathoms. 

 M.C. Charbar, a few specimens only. 



I. Karachi, also rare. 

 This is a remarkably isolated form. 



Elusa strigillata a. Ad. 



P.Gr. Gulf of Oman, Maskat. 15 fathoms. 



I. Karachi. Amongst stones and mud at very low tides. 



Elusa suuulata A. Ad. 



I. Lat. 18° 58' N., long. 71° 45' E. 40 fathoms. 

 An interesting shell, with narrow caudate apical whorls. Type 

 Japanese. 



MORMULA MAC ANDRE WI A. Ad. 



P.G. Lat. 45° 55 N., long 57° 59' E. in Gulf of Oman. 

 M.C. Charbar. On rocks at 7 fathoms. 



A very delicate species, peculiar for its numerous varices and 

 golden hue. 



MORMULA RISSOINA A. Ad. 



M.C. 



