768 MR. D. M. S. WATSON ON 
outer cusp with a rounded external surface and a deep groove 
down its inner side. All round the inner side and front and 
back of this cusp rises a strong cingulum, whose margin is raised 
and serrated so as to form a cup in the middle of the crown. 
Text-figure 16. 
ii 
ih 
JN 
if F Pl 
Deinocephalian teeth. 
A. Right dentary of type-specimen of Pnigalion oweni, X 5. 
B. Tapinocephalus?, X 3. 
C. Series of teeth of one individual of unknown genus, X 1. 
No. 49585 may be called 
Lamiasaurus newton, gen. et sp. n. 
The dentition of the upper jaw consists of four large incisors 
represented only by their alveoli, which are oval in shape and 
