1919 



TYPE AMMONITES— III 



CXXXIXa 



X o.g 



Ammonites biplex, Homoeomorph of 

 Cf. Perisph. sp., Siemiradzki, 1899, 256 ; [Shotover]," near Oxford " 

 Kimmeridge Clay [ = Ampthill Clay] ; J. W. Tutcher Coll. 

 S. 90, 32, 30, 41 ; 146, 32 (30), 28 (26), 48 



DICHOTOMOCERAS DICHOTOMUM, S. Buckman, 1919 



Prionodoceratan, dichotomum ; Genotype, Holotype 



[Oct. 1927] 



