152 SOWERBY : MARINE SHELLS OF SOUTH AFRICA. 



Littorina ahenea Linn. A common species of very extensive 



distribution. 

 Cerithium Kochii Phil. This species inhabits the Indian 



Ocean, Red Sea, and China Sea, l)ut is rarely found at the 



Cape. 

 Triforis perversa Linn. Chiefly known as a British and 



Mediterranean species. The specimens are in fair condition, 



and the identification unquestionable. 

 Cerithiopsis purpurea Angas. Mr. Angas' type is Australian, 



but several specimens have been found at Port Elizabeth. 

 Turritella sanguinea Reeve. A young and somewhat doubt- 

 ful specimen. 

 Siliquaria anguina Linn. Young specimens, undoubtedly 



of the Mediterranean species. 

 Siphonium nebulosum Dillwyn. 

 Ovulum spelta Linn. Another well-known Mediterranean 



species found at the Cape. 

 O. birostre Sow. This species, though nowhere common, is 



of very wide distribution, specimens having been found in 



Japan, Hongkong, Singapore, Ceylon, and Mauritius, as 



well as at Port Elizabeth. 

 O. carneum Poiret. Larger and lighter in colour than the 



specimens usually found in the Mediterranean. 

 Turbo (Collonia) sanguineus Linn. Minute specimens, 



but differing only in size from those frequenting the 



Mediterranean. 

 Turbo (Collonia) armillatus A. Adams (MS?). Sowerby 



Thes. Conch. This species is described as " perforate," 



but it is not always so. In some specimens the umbilicus 



is almost closed, while others exhibit none whatever. 

 Turbo (Collonia) minutus Sow. n. sp., (pi. iii, fig. 9). 



T. testa minuta, suh-orbicularis, anguste umbilicata, pallida, spira 



depressiuscula ; anfr actus 4, rapide acaescentes, convexi ; 



sutler a impressa ; anfr. ultimus hub-obliquus, rotundatus; 



J.C., vi., Oct., 1889. 



