1922 



TYPE AMMOMTES—IV 



CCCXL\III 



Fig. I 



Fin. 2 



Macrocephalites pila, Nikitin 

 " Chippenham, Wilts ; Oxford Clay," light blue clav 

 [Clay above Cornbrash] ; Geol. Surv. Engl. 30567 

 S. 40, 44, 70, 20-5 ; 68, 45, 70, 21-5 ; 28 ribs ; max. c. 90 



PLEUROCEPHALITES FOLLIFORMIS, Ncn. 

 Macrocephalitan, Plcnrocephalitcs ; Holotype. See CCLXXXI\' 



