1922 



TYPE AMMOMTES—IV 



CCCLVI* 



Fig I X 0S3 



Fie. 2 N.S. 



Hammatoceras planinsigne ; S. Buckman, 1889, cit. spec. 

 O.J.G.S., XL\', 661 ; Haselbury, Somerset^ ; " Murchisonce z.," S.B. 

 (Hudleston, Mon. Gastr., 1SS7, 41, §111, j], "Keeled Ammonite 

 S.B., ex Wright, 471 ; S. 98, 37-5, 25, 31 ; 150, 34, 22. 37-5 ; max. 15J 



PLAXAMMATOCERAS PLAXIFORME, xov. 

 Ludwigian, Erxciies ; Genotype, Holotype. Cf. CCXCIX 



