738 MR. E. A. SMITH ON WEST-AFRICAN SHELLS. [Dec. 5, 



85. Dentalium inversum, Desh. Anim. s. Vert. ed. 2, vol. v. 

 p. 599. 



Hab. Whydah. West Indies {Cuming coll.). 



86. Fissurella obtusa, Sowb. Conchol. Illust. fig. 59. no. 64. 

 = 1 F. mutabilis, Sowb. P. Z. S. 1834, p. 127. 



Hab. Whydah. Cape of Good Hope (Reeve, Conch. Icon.). 



87. Patella plumbea, Lam. Anim. s. Vert. ed. 2, vol. vii. 

 p. 530. 



Hab. Lagos, West Africa. 



88. Cylichna cylindracea, Pennant, Br. Zool. iv. p. 117, 

 t. 70. f. 85. 



Hab. Whydah. 



This species is very widely distributed, being found at Shetland 

 (Jeffreys), Madeira and Canaries (M'Andreiv), Whydah (Knocker). 

 The latter is the most southern locality yet known. 



89. Scaphander scaber, Mull. Zool. Dan. ii. p. 41, pi. 71. 

 f. 10-12. 



Hab. Whydah. 



The only difference I can detect in the present specimen is that 

 it is a trifle narrower than typical specimens of S. scaber. The 

 remark affixed to the preceding species applies to this also. 



90. Tornatina knockeri, sp. nov. (Plate LXXV. fig. 30.) 



Testa cylindrica, albida ; spira turrita, perbrevis ; apex tubercularis ; 



anfract. 5, ultimus politus, Icevis, superne angulatus et plicatus ; 



apertura anfrac. ultimum subccquans ; labium rectum; columella 



uniplicata. 

 Long. 4| mill., diam. 2. 

 Hab. Whydah. 



Easily known by its flattish spire, tubercular apex, and the plica- 

 tions at the upper part of the body-whorl. 



91. Volvula cylindrica, sp. nov. (Plate LXXV. fig. 29.) 



Testa minuta, elongato-ovata, superne rostrata, polita, alba, antice 

 et postice transversim striata, medio Icevis ; apertura superne an- 

 gusta, inferne dilatata ; columella crassa. 



Long. 5 mill., diam. 3. 



Hab. Whydah. 



Peculiar for the beaked apex and the (about 12) spiral striae at 

 the upper and lower portions. 



92. Siphonaria venosa, Reeve, Conch. Icon. ix. sp. 12. 

 Hab. Whydah. " Cape" (Reeve). 



