1921 



TYPE AMMONITES— III 



<CX 



Fig. i 



Fig. a 



Ammonites incrassatus, Simpson, 1855, Holotypc 



P. 54 ; " [Whitby], Yorkshire ; U[pper] L[ias] " ; pyritized 



[Middle Lias, pyritous shales] ; Whitby Museum, No. 149 ; 



$. 24, 30, 48, 45. See No. 119 



CCELOCERAS INCRASSATUM, Simpson sp. 

 Wessexian, pettos 



