Ch. XXI.] FOSSILS OF THE LIAS. 



Fig. 402. Fig. 403. 



319 



Hippopodium ponderosum, Sow. 

 A diam. Lias, Cheltenham. 



Fig. 405. 



Leptcena, Moorei, Dav. 

 Upper Lias, Ilminster. 



Fig. 406. 



Nautilus truncaius. Lias. 

 Fig. 407. 



Ammonites Nodotianus \ 



A. striatulus, Sow. 



Lias. 



Ammonites Bifrons, Brug 

 A. Walcoiii, Sow. 

 Upper Lias shales. 



(fig. 408) is conspicuous. Of Ophioderma Egertoni (fig. 409), referable 

 to the Ophiurce of Miiller, perfect specimens have been met with in the 

 marlstone beds of Dorset and Yorkshire. 



