1909 AMMONITES POLYOPHYLLUS 8c 



Comparable Species 



Amalthens oxynotus; Wright, Mon. 1881, XLVi, f. 4, 5 only. This 

 appears to be the same species with costal details and peripheral 

 acuteness exaggerated, perhaps by the artist. It is distinct from 

 A. oxynotus, Quenstedt. 



Ammonites scemanni, Dumortier, 1867, xliii, f. 1, 2 only, appears 

 to be a possible old age derivative of A . polyophyllus. 



