1920 



TYPE AMMONITES— III 



CXXXIXe 



V\v. 2, N.S. 



Fig. I, X 07 



Ammonites biplex, Homceomorph of 

 Yale Univ. Mus. Coll., No. 1868. Fig. 1, Peripheral view; 

 Ribs show attrition. — Fig. 2, Inner whorls and suture-line 



DICHOTOMOCERAS DICHOTOMUM, S. Buckman, 1919 

 Prionodoceratan, dichotomum ; Paratype 

 [Oct. 1927] 



