84 FUSUS. PYRULA. RANELLA. 



give an idea. They are covered with an epidermis 

 which conceals, in some species, the fine colours 

 beneath. 



" Fusiis despectus (Mtcre.v of Linnosus) is the 

 largest of the British turbinated shells, and very- 

 common : it is the large whelk. 



" Fusus contrarius, the reverse whelk, is 

 found fossil in the Essex crag. 



'' Among the shells of the Pyrula genus vve 

 find P.Jicus, the fig, placed by Linnaeus among 

 the Bulla race. P. spirilliis is a pretty species, 

 with a long canal and a flattened spire, having a 

 tubercle at its termination. 



" Second section of Canalifera : shells with 

 a varix on the right-margin. 



Struthiolaria, 



Ranella, \^ j^^^^^ 



Mured; 

 Triton, 



"' Struthiolaria, ostrich-foot, is a remarkable 

 shell from New Zealand. 



" Ranella, thorny-frog, is frequent in col- 

 lections: there are several species : R. cru- 

 mena is easily obtained — you must purchase a 

 specimen. 



" Notwithstanding the great reductions of the 

 Murex genus, it is still large, and contains very 



