1890.] MARINE MOLLUSCA OF ST. HELENA. 311 



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



Testa B. congenitse siniilis, sed tenuior, pallidior, spiraliter 

 tenuissime striata ; anfractus 5, convexiuscuU, idtimus rotun- 

 daliis, hand obsolete angidatus ; peristoma undique tenue, 

 marginibus callo tenui junctis, 

 Longit. 2 miUim., 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. 

 Rab. Cape of Good Hope. 



Triforis perversa (Linne). 



Eab. 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. 

 Hub. Cape of Good Hope. 



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



Testa minuta, imperforata, subglobosa, fusco-p%irp>i,rca, Icpvis, 

 incrementi lineis striata ; anfractus tres, conve.ciuscuU, celeriter 

 crescentes, idtimus magnus, rotundatus ; a2iertura magna, fere 

 circidaris, longit. totius | fere cequans ; peristoma interruptum, 

 margine exteriori tenui, columellari albo, incrassato, rejlexo. 

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



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

 five specimens in the collection, would be somewhat uncertain, if 

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

 white, slightly convex, and consists of about 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 

 this species (P. Z. S. 18.J3, p. 183) as Cyclostrema gramlata. The 

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



Trochus (Gibbula) musivus, Gould. 



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



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



Testa minuta, umhilicuta, depressa, alba; anfractus tres, convexi, liris 

 sph-alibus, tenuissimis, aliisque radiantibus, cancellati, ultimus 



