INOCERAMUS. 40] 
vert. Min. Conch. tab. 158) is very common, and I have 
obtained from Hamsey and Southerham examples in the 
most perfect state of preservation; it is a characteristic 
shell of the Chalk Marl of England (Foss. South D. plate 
xxy. ‘fig, 11). 
Lien. 129 INOCERAMUS CuvVIERI. Chalk. Lewes. 
Fig. 1.—Beak and hinge of an INocERAMUs. 
a. The hinge line. 
2.—Two valves of I. Cuvigert, displaced, and both 
showing the external surface. 
Inoceramus. Lign. 129.—This name, which refers to the 
fibrous structure of the shell, has been given to a fossil genus, 
of which there are about thirty species in the cretaceous 
VOL. I. DD 
