1922 



TYPE A MMOMTES—I V 



CCCXXVI 



Fie. I 



F'g-3 



Figf. 2a 



Fig. 2b 



Perisphixctes martinsii 



\'etney Cross, Bridport, Dorset ; I.O., garantiana, Shell Bed 



Geol. Surv. Engl. (S.B. Coll.), 26752 ; a, coronate stage 



S. 39, 25, 2%, 55 ; 52 ribs ; S. 78, 29-5, 31, 52 ; max. c. 120 



PRORSISPHINXTES OMPHALICUS, xov. 

 Parkinsonian, garantiana ; Holotvpe. See CC 



