j\foUuscan Fauna of St. Helena. 129 



XIII. — Further Additions to the known Marine Mollascan 

 Fauna of St. Helena. By Edgar A. Smith. 



[Plate XII. figs. 1, 2, & 7.] 



Since publishing my report upon the marine shells of 

 St. Helena* a few more species, also obtained by Capt. W. H. 

 Turton, R.E., have been identified ; some of these may be 

 regarded as indigenous and others as importations, having 

 been obtained on floating seaweed (" sea-horn ") which 

 undoubtedly drifts northward from the Cape f- In addition 

 to these, a number of marine species were also discovered by 

 Captain Turton inland at a considerable elevation. Some 

 observations on this interesting discovery will form the con- 

 cluding portion of this paper. 



I. Additional Indigenous Species. 



Lamellaria perspicua (Linn.). 



Ilah. North Sea, Atlantic, at Madeira, the Azores, Medi- 

 terranean, Adriatic, -3^gean ; also Atlantic coast of United 

 States, Port Elizabeth, South Africa, and Japan. 



Three small specimens from St. Helena appear to belong 

 to this well-known and widely distributed species. 



Trivia candi'dula, Gaskoin. 



Ilab. Mexico ( Gaskoin) ; coast of Spain, Algeria, Canary 

 Isles, Azores, Madeira, Goree. 



I have omitted in the above distribution the locality " Sand- 

 wich Islands " quoted by Sowerby in his monograph of the 

 genus Cyprica in the ' Thesaurus,' also that of Port Jackson 

 mentioned by Angas in the P. Z. S. 1871, p. 94. In the 

 latter case, at all events, I think there is little doubt o£ a 

 misidentification of the Port Jackson shells, for a specimen 

 in the British Museum from that locality presented by 

 Mr. Angas and named by him "T. candidula, Gaskoin," in 

 my opinion is merely a small example of T. scabriuscula, 

 Gray. It has quite the form of that species, has the sculp- 

 ture between the ribs and the dorsal median impression. 



The single specimen from St. Helena is small, only 

 5 millim. in length, whereas three examples presented to the 



• Proc. Zool. Soc. 1890, pp. 247-317. 

 t L. c. p. 247. 



