H4 



PALEONTOLOGY 



J K. 



FIG. 34. GASTROPODS. 



a, Pleurotomaria mosensis Buvignier, Upper Jurassic. (Xi.) (After 

 Buvignier). L.S., Lateral slit, b, b' . Bellerophon hiulcus J. de C. 

 Sowerby, Lower Carboniferous. (x.) (After de Koninck.) c, c' , 

 Euomphalus pentan%ulatus J. Sowerby, Lower Carboniferous. ( X |.) 

 (After Goldfuss.) d, Trochus inornatus Buvignier, Upper Jurassic. 



