1927 



TYPE AMMONITES— VI 



DCCI 



FiR. I 



Fig. 



Ammonites fibulatus 



Whitby, Yorkshire ; Upper Lias, [Alum Shale, Cement Shale] 



S.B. Coll. 4722 ; S. 32, 28, 25, 43-5 ; 43"5. 26, 23, 53 



Size c. 47 ; max. c. 77. Prefibulate stage 



PERONOCERAS PR^.POSITUM, nov. 

 Hildoccratan, fibulaiiini ; Holotype. See DCLXXXIII 



