1922 



TYPE AMMOMTES—IV 



CCLXXXIIl 



Fie. I 



Fig. 2 





Macrocephalites cf. ARCTicus, Xewton 



" South Cave, S. Yorks ; Kellaways Rock," siliceous, ironshot 



Mr. Frank Fetch Coll. ; S. 33, 45, 72, — ; 44, 45-5, 65, 22 + - 



Size 51 ; ribs 22 ; max. c. 55. Fam. Macrocephalitidae, nov. 



CATACEPHALITES DURUS, nov. 

 Macrocephalitan, Catacephalites ; Genotype ; Holotype. Cf. CCLXXIII 



