1906.] MOLLUSKS FROM THE PERSIAX GULF. 791 



We would also again mention the three subdivisions proposed 

 in oui- Part I. as follows : — 



(1) P.G. The whole Persian Gulf, including the Gulf of 



Oman, with Maskat and Jask, bordered eastwai'dly by 

 Long. 59° 48' E. 



(2) M.C. The Mekran Coast of Persia and Baluchistan, 



between Long. 59" 48' E. and the River Hab. 



(3) I. The Coast of Continental India, from east of the 



River Hab, abutting on Karachi, say from Long. 66° 40' E. 

 south-eastwards to Panjim, Lat. 15° 50' N., Long, 74° E. ■ 

 The Classification is that of P. Pelseneer, as proposed in his 

 ' Introduction a I'Etude des Mollusques.' 



Catalogue of the Species. 



PELECYPODA. 



Order I. PROTOBRANCHIATA. 



Fam. NucuLiD.E. 



ISTucuLA consentanea* Melvill, sp. n. (Plate LIY. fig. 7.) 



N. testa parva, solidula, pallide hrunnea vel cinerea, oblique ovata, 

 modice convexa ; costtdis tenuibus concentricis I'ugosis decorata, 

 radiatim obsciirissiine striata, lumda oblonga, niargine dorsali 

 utrinque declivi, 2^ostice elongato, antice patdlum arcuato ; 

 pagina interna margaritacea, margine multum cremdato ; 

 dentibus ad 15, fiortibus, tdtra medium fossa j^arva interruptis. 

 Alt. 5, lat. 6*50, diam. 3 (sj). maj.). 



Eab. P.G. and M.C. Gulf of Oman; lat. 24° 58' N., long. 

 56° 54' E. ; 156 fathoms, shell-sand. Also rarely off Char bar, lat. 

 25° 10' N., long. 60° 34' E., at 40 fathoms (March 1906). 



Allied to N. cidehrensis E. A. Sm., from the West Indies (' Chal- 

 lenger ' Expedition), and N. scidpturata Sowb., from South Africa, 

 the radiating and concentric sculpture being of the same charactei-. 

 It occurs commonly at the first locality, many examples, in 

 various stages of growth, being quite perfect. 



ISTucuLA layaedi a. Ad. 



P.G. Bushire. Shaikh Shuaib Island. Gulf of Oman : lat. 

 17° 18' N., long. 51° 52' S; dredged at 27 fathoms, mud. 



M.C. Lat. 25° 10' N., long. 60° 34' E. ; 40 fathoms, off" Charbar. 

 I. Karachi. 10 fathoms, mud. Bombay {A. Abercrombie) 



NUCULA NUCLEUS (L.). 



P.G. Bushire. With i\^, layardi A. Ad, We cannot 



* Consentaneus, in accord, or agreement, 



Proc. Zool. Soc— 1906. Ko. LIII. 53 



