1926 



TYPE AMMONITES— VI 



DCLXXVII 



Fig. 2 



Fig. I 



Ammonites biplex 



Hounstout Cliff, Kingston, I. of Purbeck, Dorset 



Portland Sands, White Cement Stone ; S.B. Coll. 4649 



Pres. C. H. Waddington ; S. 95, 35, c. 33, 48 ; 152, 31-5, 33-5, 50 



Ribs smaller and closer than in Leticopetrites lencus 



LEUCOPETRITES C^MENTARIUS, nov. 

 Behemothan, lencus ; Holotype. See CCCVII 



