1906.] MOLLUSKS FROM THE PERSIAN GULF. 815 



adhering to the telegraph-cable, at about 40 fathoms, and common 

 in deep-sea soundings taken in lat. 24° 55' N., long. 57° 59' E., 

 220 fathoms. 



M.C. Off Charbar, at 40 fathoms, in shell-sand, in all stages 

 of growth. 



LuciNA PAMELA, sp. n. (Plate LY. fig. 6.) 



L. testa suhorhiculai'i, par va, cinereo-alhida vel fuscescente, tenui, 

 lamiiiis concentricis irregidarihus ornata, antice rotundato- 

 ex'pansa, sibbrostrata, postice jycbulluhim truncata ; uvibonihus 

 conspicuis, prominulis, contiguis ; lunula jyarva, cordiforini ; 

 pagina inttts alba, cardine normali. 

 Alt. 5, lat. 6, diam. 2"50 mm. 



Hah. Persian Gulf: Koweit, 10 fathoms. Gulf of Oman: 

 lat. 24° 58' K, long. 56° 54' E. ; 156 fathoms. 



A small species with veiy pronounced and conspicuous umbones, 

 iri'egularly concentrically lairiinated ovei" the whole surface. From 

 the Gulf of Oman only came dead half -valves ; these, however, 

 were identical with the few perfect examples dredged off Koweit. 



LuciNA (Gyclas) semperiana Issel. 



P.G. k M.C. Found very generally at from 3 to 10 fathoms. 

 Especially abundant in shell-sand dredged off Charbar ; lat. 

 25° 10' N., long. 60° 34' E., 40 fathoms, many being very perfect 

 examples. 



I. Karachi, 15 fathoms. Off Bombay, in shell-sand (1906), 

 imperfect. 



LUCINA (CoDAKIA) ANGELA Melv. 



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

 Charbar. Also at Gwadiir, on hard sandy mud, dredged at 

 8 fathoms. 



Allied to L. fibula Reeve and L. p)ecten Lamarck. 



LuciNA (Codakia) exasperata Reeve. 



I. Karachi. Found on mud, close to rocks. 

 Also a native of Western Tropical America. 



LuciNA (Codakia) fibula Reeve. 



P.G. Shaikh Shuaib Island. 

 I. Bombay {Abercromhie). 

 Very widely distributed throughout the Tropics. ' 



LuciNA (Codakia) rugifera Reeve. 



M.C. Charbar. Usually on rocks covered with but a thin 

 layer of sandy mud. 



LoRiPES victorialis (Melv.). 



Cryptodon victorialis Melv. Ann. & Mag. Nat. Hist. (7) vol. iv. 

 p. 98, pi. ii. figs. 9, 9ffl (1899). 



