734 REPTILIA. 



being broader than long, and the second longer than broad, but only to a slight degi'ee. 

 In the young male (Pis. Ixii and Isiii), the posterior two-thirds of the lateral 

 margins of the first vertebral are sHghtly convergent, and the remaining anterior 

 third suddenly divergent. The thu'd vertebral has the same breadth in its anterior 

 half as the two shields anterior to it, but the sides of its posterior half are conver- 

 gent, its posterior border being sKghtly concave. The anterior border is nearly 

 straight, whereas the anterior border of the second shield is slightly convex. The 

 breadth of the tlikd vertebral exceeds its length about one and a half times. The 

 fourth vertebral is considerably longer than broad, and its greatest breadth is 

 attained at its middle, both its ends are of nearly the same breadth, and its anterior 

 border is shghtly convex, and its posterior border concave. 



The anterior border of the gulars is transverse, and the form of the combined 

 shields is a broad triangiilar figiu-e ; their common suture equals one-half of the 

 length of the preanals. The postgular suture with the pectorals is posteriorly 

 convex, and the length of the postgular plates is considerably less than the length 

 of the pectorals. The pectoro-abdominal suture is also posteriorly convex, biit not 

 so much as in the previous suture. The abdominal plates equal the length of the 

 preanals and one-half the length of the anals. The anals are about half the length 

 of the abdominals. The anal notch is wide, but not deep. The latera^l ridge in 

 adolescents assumes the form of an elongated eminence on the side of the pectorals, 

 and on the posterior ends of the abdominals. 



The portion of the head anterior to the eyes is slightly upturned, the naso- 

 symphyseal liae is moderately oblique and the head moderately broad. The margins 

 of the jaws are denticulated. The Hmbs are well developed, and the hind feet rather 

 In'oad and the toes are well webbed. Claws 5-4. The limbs sparsely covered, as in 

 the species generally, by small isolated scales which become large along the outer 

 margins of the limb and over the toes. The tail is long. 



The shell is pale dull greyish- green, strongly marked by three broad black 

 bands tending to unite posteriorly. The vertebral band begins on the nuchal and 

 extends on to the caudals ; the lateral bands begin on the posterior portion of the 

 first costal and generally unite behind with the vertebral band. Irregular black 

 parallel streaks or spots occur on the fourth marginal backwards, paling and dimin- 

 ishing posteriorly. The under surface of the plastron pinkish yellow, with greenish 

 areas occupying the sides of each plate, separated by yellow intervals. 



Head of the animal rich green, with a yellowish tint along the lips. A narrow 

 black band rims from the nostrils along the mesial line of the upper surface of the head, 

 somewhat expanded between the eyes, and passes on to the upper surface of the neck. 

 A narrow black dotted Une from the nostrils to the eye. The iris is greenish, Avith a 

 pinkish conjunctiva. The green of the head passes into yellowisli on the neck. 

 The tail and the outer surfaces of the hmbs are greenish, with a yellowish external 

 margin ; claws pinkish yellow ; the inner surfaces of the limbs are pale fleshy. 



Theobald described the head of the male of the animal he referred to B. trivittata 

 as having the head of a deep flesh-red, or carnation tint, apparently as in ^. hasku, 



