i54 SOWERBY : marine shells of south AFRICA. 



Trochus (Oxystele) tigrirtus Chemn. Nearly allied to T. 

 merula, but more elevated, and spotted here and there with 

 white. The base of T. merula is usually tinged with red. 



Trochus (Polydonta) nigropunctatus Reeve. I have 

 only seen a single specimen, and that not adult, from Port 

 Elizabeth. 



Trochus (Solariella) dilectus A. Adams. This charming 

 little species seems to be rare both in South African and 

 Australian waters. It is included in my father's monograph 

 of the genus Margarita in the " Conchologia Iconica." 



Fissurella Sieboldii Reeve. Resembhng F. calyculata, but 

 uniformly larger and flatter with a larger orifice. 



F. fimbriata Reeve. Allied to the European F. greeca and F. 

 negleda, but with the principal ribs more raised and foliated. 



F. fumata Reeve. Somewhat resembling F. ruppellii in form. 



Whitish, with brown or grey flames. 

 Patella longicosta Lam. A well-known characteristic species, 



tolerably common. 

 Bulla ampulla Linn. The South African specimens are smaller 



than most of those found in the Eastern seas. 



Bullina zigzac Muhlfeldt (=^. lineata Wood). Also found 

 at Mauritius, Ceylon, Australia, &c. The species is reputed 

 West Indian. B. lauta (Pease) from the Sandwich Islands 

 is the same species. 



Cylichna umbilicata Mont. Scarcely differing from British 

 specimens. 



Chiton marginatus Penn. Several specimens of this common 

 European species found living at Port Elizabeth. 



Siphonaria concinna Sow. Probably a var. of S. variabilis. 



S. venosa Reeve. 



Tellina littoralis Krauss. 



Tellina (Macoma) calcarea Chem. Scarcely distinguish- 

 able from Arctic shells. 



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



