1922 



TYPE AMMOXITES—IV 

 i-ig I 



CCCb* 



Fig. 2 



StEPHANOCERAS CRA5SIZIGZAG 



Broad Windsor, Dorset ; S.B., ex Darell, Coll. 1157 

 Fig. I. Secondary ribs appear to break up into costulae 



ZIGZAGICERAS RHABDOUCHUS, xov. 

 Zigzagiceratan, pol lit brum ; Holotype 



