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Show 1906.] MOLLUSKS FROM T11E PERSIAN GULF. 791 We would also again mention the three subdivisions proposed in our Part I. as follows:- (1) P.G. The whole Persian Gulf, including the Gulf of Oman, with Maskat and Jask, bordered eastwardly by Long. 59° 48' E. (2) M.O. 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 l'Etude des Mollusques.' C a t a l o g u e of t h e S p e c ie s . PELECYPODA. Order I. PROTOBRANCHIATA. Fain. N u c u l i i x e . N u c u l a c o n s e n t a n e a * Melvill, sp. n. (Plate LIY. fig. 7.) N. testa parva•, solidula, pallide brunnea vel cinerea, oblique ovata, modice convexa ; costidis tenuibus concentricis rugosis decorata, radiatim obscurissime striata, lunula oblonga, margine dorsali utrinque declivi, postice elongato, antice paidlum arcuato ; pagina interna margaritacea, margine multum crenidato ; dentibus ad 1 r/, fortibus, ultra medium fossa par va interruptis. Alt. 5, lat. 6*50, diam. 3 (sp. may). Hab. P.G. and M.C. Gulf of Oman; lat. 24° 58' N., long. 56° 54' E .; 156 fathoms, shell-sand. Also rarely off Charbar, lat. 25° 10' N., long. 60° 34' E., at 40 fathoms (March 1906). Allied to N. culebrensis E. A. Sm., from the West Indies (‘ Challenger' Expedition), and N. sculpturata Sowb., from South Africa, the radiating and concentric sculpture being of the same character. It occurs commonly at the first locality, many examples, in various stages of growth, being quite perfect. N u c u l a l a y a r d i 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) N u c u l a n u c l e u s (L.). P.G. Bushire. With JYt layardi A. Ad. We cannot * Consentaneus, in accord, or agreement. P roc . Z o o l . S o c .-1906, No. LIII. 5 3 |