SOWERBY : MARINE SHELLS OF S. AFRICA. 1 1 



Ovulum (Birostra) aurantium, n. sp. — Testa elongata, 

 leviter infiata, poUta^ sub-pelluclda , auraniia, iitrinqiie acu- 

 minata ; postice leviter product'/, acuta; ant ice leviter con- 

 tractu ; apertura postice augusta, simiata, antice multo 

 latior ; lahrian incrassatum, utriuque leviter si una turn. 



Long. 2J, maj. lat. 7 mill. 



A single specimen in perfect condition has been sent me 



by Mr. Bairstow ; it is allied to O. spelta, but more elongated 



and of a deep orange colour. 



Turritella Knysnaensis Kraziss. — A specimen from Port 

 Elizabeth has been submitted to me by Mr. Ponsonby. 



Littorina Knysnaensis Krauss. 



Nerita plicata Linn. 



Nerita polita Lijin. 



Nerita albicilla Linn. 



Nerita plexa Chemnitz. 



Cerithium vulgatum Linn. — A small pale variety. 



Cerithium contractu m Sowerby. 



Turbo coronatus Gmelin. — A small specimen. 



Trochus (Oxystele) zonatus V/ood. 



Trochus (Oxystele) niger A. Adams. 



Trochus (Gibbula) Benzi Krauss. 



Trochus (Gibbula?) Ponsonbyi Sowerby, "Proc, Zool. 

 Soc, 1888." — A shell of very distinct form. It is impossible 

 to say in the absence of the operculum whether it is a 

 Trochus or a Turbo, but it seems most likely to belong 

 to the Gibbula section of Trochus. 



Clanculus Laceyi n. sp. — Testa conica, griseo-fusca, ubique 

 minute seriatim granulata ; anfractus 6, conspicue biangu- 

 lati ; anfractus ultimus ad basin leviter convexus ; umbilicus 

 albus, profunde excavatus ; apertura obliqua, fauce iridescens, 

 obsolete sulcati; columella siperfie obscure plicata, ad basin 

 C07ispicue uniplicata. 



Alt. 14, maj. lat. ij mill. 



An interesting bi-angulated species, more conical than C. 



carinatus. 



