1901.] MOLLFSKS FROM THE PERSIAN GULF. 353 



Fata. Neritidje. 

 Xerita albicilla L. 



I. Karachi. Upon rocks at half -tide. Bombay (Abercrombie) ; 

 southwards to Goa (Lt.-Col. II. D. Olivier). 



Xerita chameleon L. 



Var. arabica Eeeve (sp.). 

 P.G. Gulf of Oman, Maskat. Upon rocks at half-tide. 



Var. qiiadricolor Gmel. (sp.). 

 I. Bombay. 



Xerita loxgii Eecluz. 



I. Karachi, at half-tide. Recorded likewise from Bombay, 

 where, however, Mr. A. Abercrombie did not succeed in procuring 

 it. 



Nerita oryzarfm Eecluz. 



I. Bombay, very abundant (Abercrombie). 



Xerita plexa Chemn. 



M.C. On rocks at hiiih-water mark, generally distributed ; I 

 have also found them above high-water mark, where they could 

 only possibly be reached by spray (F. W. T.). 



I. Karachi. 



Xerita (Pila) chrtsostoma Eecluz. 

 I. Karachi, at half-tide. 



Xerita (Odoxtostoma.) polita L. 



I. Bombay (Abercrombie); not reported as yet farther north. 



Xerita (Hemixerita) axodoxta Melv. 



I. Karachi (J. 0. Twelh per G. B. Sowerby). 



Xeriti>\\ (Dostia) crepidularia Lam. 



T. Karachi (var. depressa). Bombay (Abercrombie ; Olivia'). 



Though, properly speaking, an inhabitant of brackish waters, it 

 is so frequently found on the sea-shore, especially at the mouths of 

 rivers, that it is not out of place to include it in a list of Marine 

 Mollusca. 



Suborder ii. MONOTOCAEDIA. 



(a) Ptenoglossa. 



Fam. IanthiniDjE. 



Ianthlna fragilis Lam. 



I. Bombay (Abercrombie). 



Iantuina globos.v Swains. 



P.G. Gulf of Oman, near Afaskat, particularly large and fine. 



I. Thia is probabl) the species undifferentiated by Mr. AJber- 

 orombie, as occurring al Bombay with /. fragilis Lam. (communis 

 Lam.). 



Pboo. Zool. Soo.— 1901, Vol. IL \«». will. 23 



