1920 



TYPE AMMONITES— III 



CLXXXIV 



r\ 





Fig. 2 



Fig. i 



X 0'23 









tfli 





Ammonites INGENS, Young & Bird 1822, Holotypc 

 P. 247 ; xii, 2 ; " Pickering [Yorks] Oolite" [white ; man}' cream col. grs.] 



Mouth complete ; Whitby Mus. 1279 '• S. 222, 275, 30(22), 56 



S. 264, 25, 31 (23), 55 ; 336, 27, 20, 54. Ribs, 56, 46, 18; [Figs. I, 2] 



[Fig. 3, S.l. Perisph. martelli ; Siemir. p. 268] 



DICHOTOMOSPHINCTES INGENS, Young & Bird sp. 

 Perisphinctean, antecedent (ingens). Cf. CXXXIX 

 [Oct. 1927] 



