1926 



TYPE AMMONITES— VI 



DCLXXIV B 



Fig. I X 0-5 



Fig. 2 

 at A, 



N.S. 



Ammonites rotundus 



Chapmans Pool, Dorset ; S. B. Coll. 4374 



S. 158, 31, 39, — ; thickness to height, 115 : 100 



S. 185, 30, 35, — ; t. to h. 118 : 100 ; S. 249, 30, 34, 49 ; 114 : 100 



LYDISTRATITES TRIGONALIS, nov. 

 Paravirgatitan, lyditicus ; Holotype. See DCXXXIX 



