PELECYPODA. 55 



CERATISOLEN LEGUMEN, Linn. (Solen), Sowb. Illust. 

 Index Brit. Shells, pi. 2, fig. 11. Another common British 

 species, of which several specimens have been found at Port 

 Elizabeth. 



SAXICAVA ARCTICA, Linn., Sowb. Illust. Index Brit. 

 Shells, pi. 1, fig. 16. A specimen with serrated angle, exactly 

 like the typical British form, found by Mr. Crawford at Port 

 Elizabeth. 



SAXICAVA AUSTRALIS, Lamarck. The specimens shown 

 me from South Africa look very much like the British 

 S. rugosa. 



CORBULA TTNICATA, Hinds, Zoo. Voy. Sulphur, Moll. 

 p. 68, pi. 10, figs. 4, 5. Agulhas Bank. Common in the 

 China Sea, &c. 



CORBULA CUNEATA, Hinds, Zoo. Voy. Sulphur, Moll, 

 p. 68, pi. 10, fig. 6. Like the last species this is not 

 uncommon in the China Sea. It is quoted by Hinds from 

 Agulhas Bank. 



CUSPIDARIA CAPENSIS, Smith, Report Lamell. Challenger, 

 p. 45, pi. 9, figs. 5-5b. Off Cape of Good Hope. 



THRACIA CAPENSIS, Sowerby, Journ. of Conch, vol. vi. 

 1889, p. 156, pi. 3, fig. 4. Port Elizabeth. 



THRACIA VILLOSIUSCULA, Macgillivray, Sowerby, Illust. 

 Index Brit. Shells, pi. 2, fig. 9. Port Elizabeth. 



MACTRA ADANSONI, Philippi, Reeve, Conch. Icon. sp. 49. 

 -A variable species, including M. semistriata (Deshayes) 

 and probably M. decora (Deshayes). Port Elizabeth, 

 Senegal, Red Sea, &c. 



MACTRA POLITA, Chemnitz, Reeve, Conch. Icon. sp. 39. 

 Cape, and Natal coast (Krauss). 



MACTRA CAPENSIS, Sowerby, n. sp., pi. 3, fig. 68. Testa 

 elliptica, subsequilateralis, compressiuscula, albida, nitida, 

 Isevigata, concentrice subtilissime striata ; umbones acuti- 

 usculi, elevati, approximati ; margo dorsaiis utrinque declivis, 

 posticus obscure unicarinatus, ventralis mediocriter arcuatus. 



Diam. antero-post 39, umbono marg. 29 mill. 



Hab. Port Elizabeth (Crawford). 



Somewhat resembling a white variety of M. stultorum. 



