FOSSILS. PARIS BASIN. 



sometimes twenty-seven inches in length, the extremity of which 

 is almost always worn or broken by the friction and knocks occa- 

 sioned by the movement of the animal. Among other shells, of 

 which there are a great many species, it is difficult to name any 

 which are absolutely characteristic ; among the most common are 

 the Turrile'lla imbrica- 

 ta'ria (Jig. 149); the 

 ampulla 'ria acuta (fig* 

 150) ; the terebe'llum 

 fusifo'rme (fig. 151); 

 the mitra SCubra (Jig. Fig. 149. Turrite'lla imbricata'ria. 



152); the crassalella sulca'ta (Jig. 153); the car'dium porulo'sum 



Fig. \^ Ampulla' ria 

 acuta. 



Fig. l5l. Terrebe'Uttm 

 fusifo'rme. 



Fig. 152. Mitra 

 scabra. 



(fig. 154). With 



these species are 



found a great many 



others, which have 



been described and 



figured in a great 



many books on the Fig. 153. Crassate'lla sulca'ta. 



environs of Paris ; there are species which are much more com- 



Fig. 154. Car'dium porulo'sum. 



