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Show adhering to the telegrapli-cable, at about 40 fathoms, and common in deep-sea soundings taken in lat. 24J 55' N., long. 57° 59' E., 220 fathoms. M.C. Off Charbar, at 40 fathoms, in shell-sand, in all stages of growth. L ucina p am e l a , sp. ii. (Plate LY. fig. 6 .) L. testa suborb icidari, parva, cinereo-albida vel fuscescente, tenui, larninis concentricis irregularibus ornata, antice rotundato-expansa, subrostrata, post ice paidlulum truncata ; umbonibus conspicuis, prominulis, contiguis ; lunula parva, cordiformi; pagina intus alba, cardine normali. Alt. 5, lat. 6, diam. 2*50 mw?. i7a&. Persian Gulf: Koweit, 10 fathoms. Gulf of Oman : lat. 24° 58' N., long. 56° 54' E .; 156 fathoms. A small species with very pronounced and conspicuous umbones, irregularly concentrically laminated over the whole surface. From the Gulf of Oman only came dead half-valves ; these, however, w^ere identical with the few perfect examples dredged off* Koweit. L ucina (C yc la s ) semp er iana Issel. P.G. <fe M.C. Found very generally at from 3 to 10 fathoms. Especially abundant in shell-sand dredged off' Charbar; lat. 253 10' N., long. 60° 34' E., 40 fathoms, many being very perfect examples. I. Karachi, 15 fathoms. Oft* Bombay, in shell-sand (1906), imperfect. L ucina (C o d a k ia ) ange la Melv. M.C. Lat. 25° 10' JST., long. 60° 34' ‘E .; 40 fathoms, off Charbar. Also at Gwadur, on hard sandy mud, dredged at 8 fathoms. Allied to L. fibula Reeve and L. pecten Lamarck. L ucina (Co d a k ia ) exasper ata Reeve. I. Karachi. Found on mud, close to rocks. Also a native of Western Tropical America. L ucina (Co d a k ia ) f ib u l a Reeve. P.G. Shaikh Shuaib Island. I. Bombay (Abercrombie). Yery widely distributed throughout the Tropics. L ucina (C o d a k ia ) ru g ifera Reeve. M.C. Charbar. Usually on rocks covered with but a thin layer of sandy mud. L oripes v ic to r ia l is (Melv.). Cryptodon victorialis Melv. Ann. & Mag. Nat. Hist. (7) vol. iv p. 98, pi. ii. figs. 9, 9 a (1899). 1906.] MOLLUSKS FROM T11E PERSIAN GULF. ol«> |