HELCIONISCUS. 153 



H. DIRUS Reeve. PI. 73, figs. 88, 89. 



Shell ovate, erectly conoid, densely radiately ridged and ribbed, 

 ribs and ridges very closely broken up into small warts. Dark blue- 

 black, sub-iridescent in the interior. 



Although a similarity prevails between the figures of this and the 

 preceding species [P. guttata Orb.], they are very different. P. dira 

 being of a deep, erectly conical form, rayed throughout with close- 

 set ribs and ridges, crenated with small tumid warts. (Rve.} 



Habitat unknown. 



P. dira REEVE, Conch. Icon. f. 92, 1855. 



H. FUNGUS Reeve. PL 44, figs. 18, 19. 



Shell ovate, depressly conoid, apex raised, subcentral ; radiately 

 densely ribbed and ridged, ribs and ridges narrow, small, everywhere 

 finely noduled. Dull tish, dotted around the apex and near the mar- 

 gin with reddish-brown, with nodules whitish. Interior semitrans- 

 parent, iridescent. 



A dull ash, depressly conoid shell, densely rayed with finely 

 noduled ribs and ridges, sparingly marked with reddish-brown dots, 

 which are seen most distinctly in the interior of the shell. (Eve.) 



West Indies (Rve.) 



" Tectura fungus MEUSCHEN " teste Reeve. Patella fungus RVE., 

 Conch. Icon., f. 105, 1855. 



This seems to be a Helcioniscus of the H. exaratus type. The 

 locality given by Reeve is in all probability incorrect. 



H. (?) ADEL^E Potiez & Michaud. PI. 67, figs. 11, 12. 



Shell ovate, depressed, blackish, painted with nearly regularly 

 placed oblong white spots ; radiately most finely costulated, the rib- 

 lets very numerous, unequal, subgranulous. Vertex anterior, acute 

 and tawny ; margin acute, entire. Inside blackish in the depth of 

 the cavity, the margin maculated, intermediate space whitish. 

 Length 15, breadth 10, alt. 4 mill. (P. & M.) 



Habitat unknown. 



P. adelce P. & M., Galerie des Moll., Mus. de Douai, i, p. 523, t. 37' 

 f. 1, 2, 1838. 



H. LINEATUS Lamarck. PI. 73, figs. 85, 86, 87. 



Shell oval, convex, buff-brown, painted with 10-12 yellow lines ; 

 excessively numerous longitudinal close striae ; vertex acute, buff. 

 Length exceeding one inch. (Lam.) 



Habitat unknown. 



