142 



DE. J. E. GEAT'S SYNOPSIS OF THE SPECIES 



have not sufficient materials to satisfy myself as to the distinctness of this species and 

 the permanence of the forms. 



Fig. 2. Skull of B. hulieus, nearly adult. 



Fig. 1. Fig. 2. Fig. 3. Fig. 4. 



in. lines. in. lines. in. lines, in. lines. 



Length of skull 20 17 3 9 10 4 8 



Length from occiput to front of orbit ..69 .5 9 37 28 



Length of face 13 3 11 6 6 3 2 



Length of lower jaw 27 23 none. 5 5 



Width at occiput 13 .5 10 6 5 11 2 6 



Width at hinder notch 9 2 (i 9 3 9 1 6 



Width at notch 5 4 o U 2 4 U 9 



The face becomes shorter, compared with the width of the middle of the face, as the 

 animal becomes older. 



In the young, fig. 4, the length of the head is rather more than three times the width 

 of the swollen part behind the notch. In fig. 3 it is just three times, and in fig. 2 it is 



