1920 



TYPE AMMONITES— III 



CLVII 



Fig. i 



Fig. 2, X 2 



Ammonites tenuicostatus, 4 Young & Bird 1822; Topotype 

 Geol. Yorksh. 247 ; xn, 8 ; [Whitby, Yorkshire ^Upper Lias, Grey Shales] 

 Alice, Lady Fowler Coll. ; S.71, 24, 20 ? 57 ; See XXXI 



DACTYLIOCERAS TENUICOSTATUM Young & Bird sp. 

 Whitbian, tenuicostatum .... 



