1890.] MARINE MOLLUSCA OF ST. HELENA. 311 



Barleeia wallichi. (Plate XXIV. fig. 19.) 



Testa B. eongenitce shnilis, sed tenuior, pallidior, spiraliter 

 tenuissime striata ; anfractus 5, couvexiusculi, idtimus rotun- 

 daliis, hand obsolete angidatus ; peristoma itndique tenue, 

 marginihus callo tenui junctis. 

 Longit. 2 millim., diam. 1. 



This species in form is very like B. congenita, from St. Helena. 

 It is, however, rather smaller, thinner, paler, spirally striated, has 

 no approach to an angle at the periphery, and has a thinner peristome. 



Turritella carinifera, Lamarck. 

 Hab. Cape of Good Hope. 



Triforis perversa (Linne). 



Hab. South Africa (G. B. Sowerby). 



This well-known species occurs in Great Britain, Mediterranean, at 

 Madeira and the Canary Islands, also on the coast of California. 



Turbo (Ocana) cidaris, Gmelin. 

 Hab. Cape of Good Hope. 



Turbo (Collonia) incertus. (Plate XXIV. figs. 21, 21 a.) 



Testa minuta, imperforata, suhglohosa, f'usco-purpurca, Icpvis, 

 inerementi lineis striata ; anfractus tres, convexiusculi, celeriter 

 crescentes, ultimus inagnus, rotmidatus ; apertura magna, fere 

 circularis, longit. iotius'^fere cequans ; peristoma intemiptum,, 

 margine exteriori tenui, colmnellari albo, incrassato, rejlexo. 

 Longit. l| millim., diam. maj. 1|. 



The generic position of this minute species, of which there are 

 five s{)ecimens in the collection, would be somewhat uncertain, if 

 the operculum had not been present in one of tlie examples. It is 

 white, slightly convex, and consists of ahout three whorls. 



Phasianella neritina, Dunker. 

 Hab. Cape of Good Hope. 



Trochus (Cynisca) granulosus, Dunker. 



Hab. Table Bay, Cape of Good Hope. 



The type figured by Krauss (Siidafr. Moll. pi. v. fig, 28) is of a 

 pinkish tint. White varieties are also met with. A. Adams described 

 tliis species (P. Z. S. 1853, p. 183) as Cychstrema granulata. The 

 locality he gave, Philippine Islands, can scarcely be relied on. 



Trochus (Gibbula) musivus, Gould. 



Hab. Simon's Bay, Cape of Good Hope {Goidd). 



Scissurella jucunda. (Plate XXIV. figs. 22, 22 a.) 



Testa mimda,umhilicata,depressa, alba; anfractus tres, convexi,liris 

 spiralibus, tenuissimis, aliisque radiantibus, cancellati, ultimus 



