1922 



TYPE AMMOMTES—IV 



CCXCVa 





Fig. 3 



Fig. 2 



Fig. I 



Ammonites chalcedonicus 

 Horspath, near Oxford ; Lower Calcareous Grit, [upper part 

 S.B. Coll. 3601, loose on stone heap ; S. (312, — , 45, — ) ? ; max. c. 410 

 (Fig. 3, S\-nthetograph s.l., CCXCVa + b + surmise) 



CHALCEDOXICERAS CHALCEDOXICUM, Young cV Bird sp. 

 Cardioceratan, Vertehriceras ; Genotype. Cf. CLVI 



