1900.] MOLLUSK.S FROM THE PKRSIA.V OLLF. 843 



CORBULA KKVTllR.f:E\SJ.S H. Ad. 



P.G. Many dead exauiples dreflged at 40 fathoms, mud. 

 .\r.C. Off Cfipe Moiiy.e. l)i-edged at 00 fatlioras. 

 I. Ktirachi. 



CoRHi:i.A MODESTA Hiuds. 



P.G. Linjali, Klais and Sliaikli .Shuaib Lsland.s. 



M.C. In .several places from 3-10 fathoms, mostly sand 

 bottom. 



I. Karaclii. Bombay (Ahercro'inhie). Ratnagii-i. and further 

 southwards. It was dredged off Quilon, Malabar Coast, beyond 

 on)- limit, by Captain TindalJ, of s.s. • Patrick 8te\vai-t.' 



CoRBULA PEKSICA Smith, 



Corhida persica E. A. Smith, Ann. & Mag. Xat. Hist. ser. 7, 

 xviii. p. 202 (1906). 



P.G. 47 fathoms (' Jnresti gator '). Gulf of Oman : lat. 24° 

 .58' X., long. 56° 54' £. ; 1 50 fathoms, in shell-sand. Also M.C, 

 lat. 25' 10' X., long. 60'^ M' E., 40 fathoms. 



A small species, allied to C phAlij>pii E. A. Sm. 



CORBULA RUGIFERA H. Ad. 



I. KLarachi. 



CoRBULA SUBQ (:ai>rata Melvill, sp. n. (Plate LVl. fig. 7.) 



C iesta parva. ocata, inoiquMli, iw/iquilaterali, aniice rotuTidata, 

 postice pjrodncta, sii,hquadrato-anguh:ita ; valvis concentrice 

 Irp/ricostattJi, siyjerficie alba, nitida, mxirgine dorsali utrvnque 

 leniter declivi, p>ostice elongatulo, quatj/ratvlo, interdum nasuto, 

 ventrali paidlum slnvato ; umhonihv^s hwurvis, haud multum 

 prorninvXis, crassiuscalis; pagina interna alhoj ; fJjC.nte cardinrdi 

 normali, prromhiente. 

 Alt. 3. lat. 4-50. diam. {valvoi d^extra:) 1'50 mni. 

 Hah. Persian Gulf: Gulf of Oman. Lat. 24= 58' X., long. 56° 

 54' E. ; 156 fathoms. 



I. Bombay (Ahrrrcrombie) ; nearl}" always irnpei-fect. in shell- 

 sand. 



The specimens fi-om the Gulf of Oman seem only to differ from 

 those from further south in being slightly smaller, the dimensions 

 given above being taken from Bombay examples, in Avhich place 

 it seems local, but common where it occurs. A few Omanese 

 examples aie pei-f ect, showing the left valve .smaller than its fellow, 

 the form suV^quadrate, the posterior side elongatel}- produced and 

 finely sfpjarely truncate ; the superficial concentiic ribs are about 

 12 in number, more tlian Ls found in the neaily allied C. modesta 

 Hinds, with Avhich this may have been confounded occa.sionally. 



Coebula sulculosa a. Ad. 



P.G. Shaikh Shuaib Island. Gulf of Oman. ]Maskat ; 10 

 fathoms, niuddv ^^and Ijottom. 



