1918 



YORKSHIRE TYPE AMMONITES— II CXVIIIa 



Fig. i 



Fig. 2 



Fig- 3 



Ammonites dissimilis, Williamson, Chirotype ? 



Brown 1849, Holotype — PL xx*, f. 12(13 ?) ; The Manchester Museum 



Fig. 1, Side view ; Fig. 2, Apertural view ; Fig 3, Peripheral view 



EBORACICERAS DISSIMILE, Brown sp. 



