SOUTH AFEICAN MARINE MOLLUSCA. 201 



Rissoa adjacens ii. sp. PI. YIT, fig. 13. 



Testa niicroscopica, ovata, imperforata, pelliicida, polita, 

 dilute fuscescens; anfractiis85-4 convex!, celeriter crescentes, 

 iiltimns antice descendens ; apertura ]'ii'iformis, parva, con- 

 tracta; peristomiuiii continuum, fuscescens, incrassatum, supra 

 ad insertionem fortiter callosum. 



Longit. 1, diam. '5 mill. 



Hab. — Fonr miles south of Port Elizabeth (J. Farquhar). 



Very closely allied to R. atomus Smith^ ; but faintly 

 tinted, with a brown peristome which is more distinctly con- 

 tinuous ; the aperture also is more contracted, the Avhorls 

 rather more convex, and the last descends near the aperture. 



Mitrularia equestris {Linn.). 



Calyptrasa equestris {Linruvu.^-) ; Reeve, 'Conch. Icon.,' 

 vol. xi, figs. 1-lc. 



Hab. — Durban and Scottburgh (Quekett and Burnup). 



Other localities are Maui'itius, Persian Gulf, Andaman Is., 

 Maldive Is., Malay Archipelago, Queensland, 



The genus Cheilea, used by some authors for this species, 

 as founded by Modeer,- included the Linnean species Patella 

 fornicata, porcellana, crepidula, chinensis, and 

 equestris. 



Vanikoro natalensis Smith. 



A^anikoro natalensis S)iiif]i, ' Proc. Alalac. Soc.,' vol. 

 viii, p. 113 fig. 



Hab. — Scottburgh (H. Burnup) ; Bluff, Durban (Wescott) ; 

 ;N"atal (Recluz). 



Lamellaria perspicua {Linn.). 



Lamellaria perspicua [Tjinn.) ; Sowerby, 'Marine Shells 

 S. Afr.,' p. 23. 



' Ibid., 1890, p. 309, pi. xxiv, fig. 14. 



- ' K. Vet. Ac. Nya ilandl.,' vol. xiv, p. 110 (1793). 



