91 



separated from one another by a stripe of irregular elongate shields. 

 The outer of these series borders the side of the lower lip, and is 

 formed by five shields similar to the correspondent upper labials ; 

 the inner series is formed by six or seven shields, shorter, quadran- 

 gular, and becoming smaller behind. The triangular space between, 

 of the chin and of the front part of the throat, is covered by minute 

 granular scales. 



The trunk is depressed, with rounded sides, twice and one half as 

 long as the head ; it is covered by minute, rhombic scales. Those of 

 the vertebral line ai-e largest, not quite the size of those of the belly, 

 each with a medial keel, which, being prominent, form together a low 

 crest from the occiput to the middle of the tail; in several rows, nearest 

 to the vertebral line, and especially nearest to the tail, the scales are 

 apparently keeled ; on the neck, between the shoulders and on the 

 sides, the scales are smallest, and exhibit more the appearance of fine 

 granulations ; on the sides of the belly they assume again the ap- 

 pearance of scales, are rhombic on the belly, and arranged in transverse 

 rows, each with about twenty-eight scales. These rows are more 

 oblique on the breast, but they are all perfectly smooth. The tail is 

 not quite one and a half as long as head and trunk together ; it is 

 stout, round, and tapering ; it is surrounded by rings of oblong scales, 

 about the size of those of the belly ; each is provided with a strong 

 keel, running in the diagonal line, and prominent behind. The 

 scales of the dorsal line are rather smaller, more of a pentangular 

 shape, and with a keel along the medial line. 



The extremities are covered with rhombic scales, apparently im- 

 bricate ; the upper ones keeled, the lower ones smooth. The length 

 of the front extremity — from the humeral joint to the base of the 

 fourth toe — is as long as the head ; and the fourth toe is the longest, 

 and half that length. The third is scarcely shorter ; then comes the 

 second, the fifth, and finally the first, being not quite one-half of the 

 third. They are all slightly compressed, above smooth, beneath 

 rough by the keels of scales, and provided with acute curved claws. 

 The posterior extremity (without the foot) is not quite half as long as 

 the trunk, and the hand one and one-third as long as the head ; the 

 fifth toe is separated from the four inner ones, and about as long as 

 the third (from the point where they become free). The fourth toe 

 is far the longest ; then comes the third (and fifth), then the second, 

 and finally the first, the latter being not quite half the length of the 

 fifth. 



The ground-colour of the upper parts is bluish-green, in one of the 

 specimens greenish-brown, which colour predominates on the head 

 and tail. All the upper parts, the head excepted, or at least the 

 middle of the back and tail, are marked with dark brown. On each 

 side of the shoulder, in front of the base of the fore extremity, is a 

 black cross-band, lighter edged ; it reaches from the fold on the side 

 of the throat, across the shoulder to near the vertebral crest. The 

 lower parts are greenish-yellow, the throat being marked vrith bluish- 

 green. 



