300 MR. E. A. SMITH ON THE [Apr. 1, 



Pedipes afer (Gmelin). 



Hab. Portugal, Azores, Madeira, Salvages, and some parts of the 

 shore of West Africa. 



This well-known species has not been previously recorded from 

 St. Helena. None of the specimens obtained by Capt. Turton were 

 living, but were found in the hard kind of conglomerate of shells 

 and sand mentioned in the introductory observations. 



Gadinia costata (Krauss). 



Mouretia costata, Krauss, Siidafr. Moll. p. .57, pi. 4. fig. 1. 

 Gadinia costata, Dall, Anier. Journ. Conch, vol. vi. p. 11. 



Hab. Cape of Good Hope. 



The St. Helena specimens have more colour than most of the South 

 African shells I have seen. In other respects they are similar. 



The following HETEROPODA were obtained by dredging :— 



OxYGYRUs keraudrenii, Lcsucur. 



Atlanta peronii, Lesueur. 



Atlanta inclinata, Eydoux & Souleyet. 



The synonymy and distribution of these species are given in my 

 Report on the ' Challenger ' Heteropoda. 



IV. SCAPHOPODA. 

 Cadulus jeffreysii, Monterosato. 



The synonymy and distribution of this species are given by 

 Jeffrej^s (Proc. Zool. Soc. 1882, p. 6G5). I have carefully compared 

 the series of specimens from St. Helena with others obtained by the 

 ' Porcupine ' Expedition in the Atlantic, and can find no difference, 

 except in size. Those from St. Helena are a trifle smaller. 



V. PELECYPODA. 



Venus (Ventricola) effossa, Bivona. 



Venus effossa, Bivona, PfeifFer, Conch.-Oab. p. 197, pi. 32. 

 figs. 1-4. 



Hab. Sicily, Naples, Corsica, Algeria, Canary Islands, Azores. 



The largest of the specimens from St. Helena is twenty-five 

 millimetres long and high, and twenty-three in diameter. None of 

 them have the lunule quite as deep as the Mediterranean shells 

 figured by Pfeiffer and Philippi (Moll. Sicil. vol. i. pi. iii. fig. 20). 

 V. toreuma, Gould, is very closely related to this species, but may 

 be distinguished by its finer concentric ribs, which are more or less 

 granular, V. effossa is radiately striated, especially at the anterior 

 and posterior ends. The colour of the specimens at hand is similar 

 to the above-cited figure in the ' Conchylien-Cabinet.' 



