SOUTH AFRICAN MARINE MOLLUSCA. 57 



front margin, is roundly ovate, small, and thickened within 

 with a white collar, which is truncate behind. The interior 

 of the shell has a thin deposit of white, glossy callus, through 

 which the external costa3 are visible, producing a radiate- 

 lineated appearance. The dotting upon the margin is formed 

 by the tei'minations of the costs?, the dots being in minute 

 depressions between the denticulations. It is impossible to 

 say whether this species attains much larger dimensions 

 than those given above. However, the specimen described 

 appears to be fairly mature. 



Puncturella noachina {Liiin.}. 



Puncturella noachina Linn.: Sowerby, ' Marine Invest./ 

 vol. ii, p. 231. 



Hab. — Off South Africa, 125 fathoms. 



This northern species also occurs as far south as the 

 Straits of Magellan and Kerguelen Island. 



■^Puncturella fastigiata {A. Adams). 



Cemoria fastigiata A. Adams; Sowerby's 'Thesaurus 

 Conch.,' vol. iii, p. 208, PI. OCXLA^ figs. 15, 16; Martens, 

 ' Tiefsee-Exped.,' p. 50, as Puncturella. 



Hab. — Simon's Bay, 38 fathoms. 



Hanleya sykesi {Soirerhy). 



Chiton (Hanleya) Sykesi Soicerhy, 'Marine Invest.,' 

 vol. ii, p. 225, PI. V, fig. 13. 



Hab. — South Africa 166 and 210 fathoms. 



SCAPHOPODA. 



Dentalium plurifissuratum Soicerby. 



Dentalium plurifissuratum Soiverhy : Pilsbry, 'Man. 

 Conch.,' vol. xvii, p. 82, PI. VI, figs. 87-89; Sowerby, 

 'Marine Invest.,' vol. ii, p. 231. 



Hab. — Off Cape St, Blaize, 55-100 fathoms. 



