1906.] MOLLUSKS FROM THE PERSIAN GULF. 813 



Oardita canaliculata Reeve. 



P.CI. Gulf of Oman, Maskat. 



I. Karachi. 

 Usually found at 5-10 fathoms, coral-sand bottom. 



Cardita ECHmARiA, sp. n. (Plate LVI. fig. 8.) 



C. testa ceqioivalvi, solidiuscula, trapezoidea, cdho-rufa, antice de- 

 clivi, postice stobqttadrata, margine dorscdi fere recto, ventrali 

 rotundato ; umbonibus contiguis,liimi,lapcorva, cordata ; costis 

 numerosis, circa 23, breviterechinatis,spinidis justice interdttvi 

 longioribus ; cardine nor^nali ; 2>'^''()ina interna alba, margine 

 crenifero. 

 Alt. 1'50, lat, 1'50, diam. 1 imn. 

 Hab. P.G. Dabai. 



A small species with clearly-cut ribs, shortly spined or echinate, 

 quadrate in form, someAvhat resembling C. acideata Poli, from 

 the Mediterranean, but far more squarrosely truncate. Although 

 not bearing an unfamiliai- " facies," it seems to have been 

 hitherto unnoticed. 



Cardita cumixgi Desh. 



P.G. Locality not specified. This insertion is made with some 

 slight doubt, and more specimens are required for confirmation. 



Cardita tankervillei Rve. 



I. Karachi. Mentioned in Major Baker's list but not yet 

 found by Mr. Townsend. 



Mytilicardia calyculata (L.). 



P.G. Gulf of Oman, but not general. 

 M.O. Charbar, 7 fathoms, on rock. 



I. Ratnagiri {Abercrombie). Panjim and Goa (Lt.-Gol. H. 

 D. Olivier). 



A Mediterranean species. 



Mytilicardia distorta Reeve. 



P.G. Exact locality doubtful. A common species in Erythraean 

 waters. 



Mytilicardia ffi:s^chi Melv. 



P.G. Occasionally at 30 fathoms. Thairi, 10 fathoms. Also 

 near Maskat, Gulf of Oman, at 10 fathoms, coral-sand bottom. 



Very distinct in form from, though allied to, M. crassi- 

 costata Lam., mentioned as from Karachi in Major Baker's 

 list. It seems highly probable M. ffinchi was the species then 

 noticed. 



Mytilicardia gubernaculum Reeve. 



P.G. Gulf of Oman, local. Near Jask, di-edged at 7 fathoms, 

 amongst loose rocks and sandy mud. 



