PLATE 2. 



Belosepia sepioidea (Blainville). 



FIG. i. Profile of the rostrum showing its curvature, and robust base. 

 FlG. 2. Ventral view of same specimen showing the radiately channelled, semicircular 

 plate, and the alveolar cavity beneath. 



Suroula ingens (Mayer-Eymar). 

 FlG. 3. Dorsal view of large example showing the deeply sinuated lines between the 



periphery and the suture. 

 FlG. 4. Apertural aspect of same fossil. 



FlG. 5. Dorsal view of a younger specimen in which the peripheral tubercles and finely 

 reticulate structure, are well preserved. 



Suroula africana, sp. nov. 

 FlGS. 6 and 7. Dorsal view of different examples showing the complicated ornamentation 



and the sinuated region between the periphery and the suture. 

 FlG. 8. Apertural view of a small specimen. 



Rhopalithes africanus, sp. nov. 

 FlG. 9. Dorsal aspect showing the extremely fine spiral sculpture, and the swollen, 



longitudinal costae on the earlier whorls of the spire. 

 FlG. 10. View of another specimen showing the narrow aperture and long vertical canal. 



Eopleurotoma nigeriensis, sp. nov. 

 FlG. II. Profile of an example showing the outwardly curved margin of the aperture 



and the excavated sinus at the shoulder. 

 FlG. 12. A smaller form showing the narrow aperture, and the closely costate sculpture. 



Crepidula falooneri, sp. nov. 

 FlG. 13. Profile of an adult example exhibiting the postero- lateral spiral region and the 



capacious body chamber. 

 FlG. I3A. Interior of same individual with the sunken diaphragm, lateral muscular 



scars, and the probable mantle attachment markings on the inner surface. 



Semiterebellum elongatum, sp. nov. 

 FlG. 14. Dorsal view showing remains of spiral sculpture at the base, the recurved 



posterior canal, and obscure sutural carination. 

 FlG. 15. Apertural view of another specimen, showing the forward curvature of the 



labrum, and the callosity covering the columella. 



Sinum of. clathratum (Gmelin). 

 FlG. 1 6. Dorsal view showing a well exposed depressed spire and the closely spiral 



sculpture. 

 FlG. 17. Apertural view of a smaller specimen exhibiting the narrow, umbilical cavity, 



and the slightly reflected inner lip. 



Cominella douvillei, sp. nov. 



FlG. 1 8. Dorsal view of example showing the complicated ornamentation. 

 FlG. 19. View showing narrow, elongate aperture with the interno-marginal ridges of 

 the outer lip. 



