SOWERBY : MARINE SHELLS OF SOUTH AFRICA. 5 



P. cataracta Chemnitz. 



P. capensis Petit. — Mr. Tryon in his 'Manual of Con- 



chology ' quotes this species as a variety of the Japanese 



P. luteostoma. In this I can hardly agree with him. 

 Pleurotoma sinuatum Deshayes {=F. bucdnoides Kiener). — 



A more or less ribbed species with a brown or black 



epidermis, which has been made the type of a genus 



{Clionella Gray), and erroneously classed with the family 



Melaniidoe. 

 P. rosaria Reeve. — A smaller species resembling P. sinuatum 



in form, but orange or rose colour. 

 P. kraussi Smith. — Another species of the Clionella section ; 



whitish, with waved brown lines. 

 P. subventricosus Smith. — Somewhat like P. kraussi^ but 



much less prominently ribbed. 

 P. semicostata Kiener. — Whitish, with prominent ribs in the 



middle of the whorls. 

 P. castanea Reeve. — The specimens are of a darker colour 



than Reeve's type. It is a small dark-brown species of 



the Drillia section. 

 P. hottentota Smith. — A small species with a long spire and 



short mouth, generally white below and light-brown above, 



with a brown band at the top of the whorls. 

 P. caffra Smith. — An orange -coloured species with rather a 



large body-whorl, and comparatively open mouth. 

 P. diversa Smith. — This pretty little species seems to be 



rarely found. It is allied to P. caffra, but the longitudinal 



ribs are made conspicuous by the intervention of dark 



brown flames. 

 P. capensis Smith. — A species of the Defrancia section, with 



a crisply cancellated surface, reminding one of the British 



P. reticulata^ &c. 

 P. tripartita Smith. — A fine species, very rarely found in 



good condition. 



