i a 



I LTALOGUE OF SHIELD REPTILES 



l is 3. 



Bombifrons indicus. Skull : fig. 3, half-grown; fig. 4, young, nat. size (see C. trigonops, Gray). 



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

 in. lin. in. lin. in. lin. in. lin. 



Length of stall 20 17 3 9 10 4 8 



Length from occiput to 



front of orbit 69 59 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 26 



Width at hinder notch 92 69 39 16 



Width at notch -14 5 11 2 4 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 twice and a half the -width at the same part ; and in 

 the old skull (fig. 1) it is only a little more than twice 

 the width of the face. 



As a good illustration of the difference in the appearance 



of the skulls of the individuals of the species, I may give 

 the measurements of two skulls of " Muggars *' from India, 

 of the same size, in the British-Museum collection :— 



Broad Narrow 



variety. variety. 



inches. inches. 



Length of the skull along the forehead 9g 9| 



Length of side of skull lOg lOg 



Width of back of skull 5| 5% 



Width in front of orbits 4| 4 



Width over largest tooth 3^ 3| 



Width at notch 2 L V 2 or 1|£ 



The broad-nosed variety (fig. 3) was presented by Sir J. 

 Boileau, and the narrow one by Capt. Boys. 



When the two skulls are placed side by side, the large 

 teeth are just the same distance apart ; and the different 

 teeth in the two skulls exactly agree in ske, position, and 

 distance from each other. 



