452 MESSRS. MELVILE AND STANDEV ON [J line L8, 



Action exilis Jeffr. (=nitidus Verrill). 



P.G. Gulf of Oman, lat. 24° 05' N., long. 57° 35' E. 205 

 fathoms, mud. 



The discovery of this species in the Persian Gulf increases the 

 range as hitherto known. Discovered by Dr. Gwyn Jeffreys in 

 1 870, in the North Atlantic, 227-1456 fathoms, it was subsequently 

 found in the Bay of Biscay, Mediterranean Sea, Azores (' Challenger' 

 Expedition), also E. coast of Florida, and Martha's Vineyard, 

 Rhode I., U.S.A., likewise the Campeche Bank, Gulf of Mexico 

 (vide Pilsbry in Man. of Conch, vol. xv. p. 156). 



Our examples seem near the American variety (A. nitidus 

 Verrill). 



Action elammeus Gmel. 

 P.G. Gulf of Oman, Maskat. 15 fathoms. 

 Shaikh Shuaib Island. 10 fathoms, coral-sand. 

 Sometimes occurs at low-tide mark. 



Act.eon pubicus A. Ad. 

 I. Karachi. 



Act .eon sieboldi Rve. 



P.G. Gulf of Oman. 10 fathoms, mud. 



M.C. 8 fathoms, not frequent. 



Leucotina AMffiXA A. Ad. (Myonia). 

 P.G. and M.C. No exact record. 

 I. Bombay (Abercrombie). 



Leucotina eximia Lischke. 

 I. Bombay (Abercrombie). 



Leucotina gratiosa Mel v. 



P.G. Off Shaikh Shuaib I. 10 fathoms, in setnifossil con- 

 dition. 



I. Karachi, very rarely. 



Leucotina jaseensis Melv. 



P.G. Gulf of Oman, Jask. Dredged at 3 fathoms, muddy 

 sand. A very graceful species. 



Bullina scabra Gmel. (= Valuta ziczac Muhlfeldt). 



M.C. Generally occurs on the coasts of Persia and Baluchistan 

 from low tide to 5 fathoms, sandy mud. Common at Ormara. 



I. Bombay (Abercrombie). 



Distributed through both hemispheres, though not yet found 

 on the American coasts. 



