828 MESSRS. MELVILL AND STANDEN ON [Nov. 13, 



Mactrinula PLICATARIA (L.). 



I. Bombay, but rarely, and mostly in imperfect condition 

 {Ahercromhie) . 



Mactrinula tryphera Melv. 



P.G. Hinderabi I. 35 fathoms, mud. 



M.O. Cliarbar. 15 fathoms; one specimen. 40 fathoms; 

 broken shells, common. 



A most delicate species, of which but very few examples have, 

 so far, been found. It has been recently dredged by the ' Investi- 

 gator' at 35 fathoms, also in the Pei-sian Gulf*. 



RAiiTA abercrombiei Melv. 



I. Bombay {Ahercroinhie). 



A particularly delicate and beautiful shell, belonging to a very 

 restricted genus, the tyjje of which (^R. canaliculata Say) was 

 noticed some years ago by one of us particularly abundant in 

 Charleston Harbour, South Carolina. About fourteen species 

 hav'e been described, one most recently by Dr. R. Sturany as 

 R.hracheon'\, from the Red Sea. 



Standella (Merope) tEgyptiaca Chemn. 

 I. Karachi {Major Baker). 



Standella (Merope) capillacea Desh. 



M.C. Astola Island, at 10 fathoms, on rocks towards the south. 



I. Karachi. In peat-mud on Manora., west beach, all dead 

 but perfect specimens. Bombay {Ahercrombie) southwards to 

 Goa and Panjim (Olivier). Juvenile examples difier very much 

 from the adult in greater definiteness of striation. 



Standella (Merope) pellucida Chemn. 



I. Bombay (Ahercrombie), extending southwards to Ratnagiri. 

 This species, in common with the preceding (cajjillacea), some- 

 times attains considerable dimensions, say 4" x 2|-3". 



Anatinella CANDIDA Chemii. 



I. Between Bombay and Ratnagiri (E. H. Aitken). 



Suborder C. VENERACEA. 

 Fam. VeneriDzE. 

 Section i. Cytherea Lamarck. 

 Tivela ponderosa Koch. 

 M.O. Charbar. 7 fathoms. 



I. Karachi. Living amongst loose wet sand, a few inches 

 below the surface, at low tides. 



* E. A. Smith, Ann. & Mao;. Nat. Hist. ser. 7, vol. xviii. p. 260 (1906). 



t Expedition S.M. Scliiff ' Pola ' in das Eothe Meer 1895-96 und 1897-9S. Zool. 

 Ergebnisse, Lamellibranchiaten von Dr. Rudolf Sturany (Wien, 1899), Tat', iii. 

 figs. 1-6. 



