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Show 728 MR. E. A. SMITH ON WEST-AFRICAN SHELLS. [Dec. 5, 8. DONAX RUGOSUS, Linn. Syst. Nat. (12th ed.) p. 112". Hab. Whydah. 9. DONAX (CAPSELLA) OWENII, Gray, MS. in Brit. Mus.; Hanley, Cat. Rec. Shells, p. 81. Hab. Whydah. 10. MACTRA (TRIGONELLA) ADANSONI, Phil. Zeitsch. fiir Malac. 1848, p. 152. Hab. Whydah. 11. MACTRA (SCHIZODESMA) NITIDA, Schroter, Einl. Conch. iii. pl. 8. f. 2. Hab. Whydah. 12. CHAMA SENEGALENSIS, Reeve, Conch. Icon. iv. sp. 5. Hab. Whydah. 13. LEDA ROSTRATA, Mont. Test. Brit. Suppl. p. 55, pl. 27. f. 7. Hab. Whydah. 14. LEDA TUBERCULATA, sp. nov. (Plate LXXV. fig. 1.) Testa ineequilateralis, oblonga, postice modice rostrata, griseo-alba antice plica: 3 ad 4 oblique longitudinales, striis transversis decussatee; postice vel rostro tubercularum parvarum series 5 ad 6 obliquee umbone radiantes; regione centrali costee 16 concentricce, crassce; versus umbonem et marginem ventralem densissimee; interstitio exilius striata. Diam. transversa 8 mill., diam. longit. 4. Hab. Whydah. 15. LEDA, sp. ? jun. Hab. Whydah. A small, very strongly, obliquely ribbed species, but too young to satisfactorily determine. 16. SOLEN (CULTELLUS) TENUIS, Gray, ? MS. in Brit. Mus. Hab. Whydah. 17. CORBULA MODESTA, Hinds, P. Z. S. 1843, p. 57. Hab. Whydah. This species is described by Hinds as coming from Macassar and the Philippine Islands. 18. CORBULA STRIATA, sp. nov. (Plate LXXV. fig. 3.) Testa parva, cequilateralis, paululum rostrata, albida cum macula triangulari rosea ornata; transversim crasse costata; striee longitudinales exilissimce creberrimcc supra et inter costas radiantes. Diam. transversa 6 mill., diam. longit. 3|. |