A FOSSIL REPTILE. 
EXPLANATION OF THE PLATES. 
Puate I, 
Procolophon trigoniceps. 
Dorsal aspect of the nearly complete skeleton of a male (B.M. R. 4087). 
Collected by the avthor at Haslop Hill, Dist. Tarka, 8. Africa. 
Prater II. 
Procolophon trigoniceps. 
Ventral aspect of the specimen shown in PI. I. 
Prats III. 
Procolophon trigoniceps. 
The specimen shown in Pi. I., from the left side. 
Proc. Zoou. Soc.—1914, No. LI. 51 
