1925 



TYPE AMMONITES— VI 



DXC 



Fig. I 



Fig. 2 



-^.f ^ 





^^77) ^^as^,/^es. ^-^Z. -^^ 



Fig- 3 



Ammonites rotundus, J. Sowerby, 1821, Holotype 

 M.C. iii, 169 ; CCXCIII, 3 ; " from Purbeck, prob. fd. in Kim. Claj' " 

 [Chapman's Pool, I. of Purbeck, Dorset ; K.C. Nodule Bed= Portl. Sands] 

 Brit. Mus. N.H. 43899 ; S. 74, 26, 28, 50 ; 84, 26, 29, 50 



PALLASICERAS ROTUNDUM, J. Sowerby, sp. 

 Paravirgatitan, lyditicns ; Genotype. Cf. CCCLIII 



