1921 



TYPE AMMONITES— III 



CCIX 



Fig. 1 



&W/y 



I •'£>%. 



W,hX 



Fig. 2. 



Ammonites crassiusculus, Simpson, 1855, Holotype 



Pp- 56. 57 ; " [Whitby], Yorkshire ; hiard bands of the Middle Lias "; 



Whitby Museum, No. 499 ; <f>. 37, 25.5, 34, 49. See No. 91. 



PORPOCERAS CRASSIUSCULUM, Simpson sp. 

 Whitbian, athleticum 



