CROCODILIANS, LIZARDS, AND SNAKES. 449 



enlarged lateral giilar .scales are not very conspicuous, and form a short 

 series. The occipital liorns are long and acute. The internal temporals 

 are half as long, and the external temporals are as long as the internal. 

 They are directed nearly transver.sely, while the internal temporals are 

 directed at an angle of 45°, and the occipitals more nearly i)osteriorly. 

 The tail is broad and flat, and i.s bordered on each side by a fringe of 

 rather closely placed spinous scales. Femoral pores numerous, in 

 undivided scales. ><o accessory horns. Nares anterior. 



The iufralabial scales have anteriorly prominent angles, and are pro- 

 duced into short horns posteriorly. The scales of the head arc larger 

 than in most other species, and they are obscurely rugose to nearly 

 smooth. Tliere are five scales in a transverse row between the cau- 

 thals on the anterior frontal angle. Of these the laterals are quite 

 small, and the median three larger than in any other species, especially 

 those on each side of the median. Supraoculars from two and three in 

 a crossrow behind to four in front. Posterior superciliary angle not 

 much jiroduced, the penultimate superciliary scale not prominent nor 

 even angular. Middle parietal region convex and not separated from 

 the temi)oral region by an angle. Superior labials nine and ten to 

 below the middle of the eye, forming a serrate border except anteriorly. 

 In the temporal series of scales the one adjacent to the external tem- 

 l>oral horn is very prominent, and the two anterior to it have apical 

 angles. 



The lateral cervical scales which are in line with the enlarged gidars 

 (at a considerable distance) are only two or three in number, instead 

 of forming the usual series, while the lateral cervical rosette above them 

 is represented by a series of five or six large scales with basals. The 

 ground scales of the back are flat, smooth, of various sizes, and gener- 

 ally broader than long. The eidarged scales are broader than long, 

 keeled, and, except to a limited extent in one row, not free ])osteri()rly. 

 There is a row of the smaller of the keeled scales on each side of the mid- 

 dle line, which is quite regular. The largest scales form a widely spaced 

 row just external to the.se. The other keeled scales diminish in size 

 exteriuiUy, and they do not form regular rows. They become more 

 conic externally. Humerus aiul forearm covered with large keeled 

 scales with free apices, except iuferiorly. Scales of femur and tibia 

 keeled and of diverse sizes, except on the concealed surfaces, where they 

 are smaller, though generally similar. Scales of inferior surfaces 

 smooth, except on the thorax, where they are faintly keeled and gradu- 

 ate into those of the humerus. 



Extended hind leg reaching the axilla in female, or to the front of the 

 humerus in male. Femoral pores 21-21 in the male, 18-17 in the female, 

 in undivided scales. In the male there are 3-3 additional pores on an 

 adjacent row of scales. Lateral S(!ales of the toes produced, nujst on 

 the external sides. 



Measurements (Cat. No. 15955, nuile). — Total length, lOS nun,; lengtli 

 NAT MUS OS 20 



