CROCODILIANS, LIZARDS, AND SNAKES. 537 



be mistaken for the suprauasals, which are still smaller. Those of the 

 third pair are more developed, are almost of the dimeusions of the 

 prefrontals in Bocourt's specimen, but smaller in mine. The latter are 

 pentagonal and articulate with the anterior angle of the frontal. The 

 frontal is larger behind than before, equal in length to the distance from 

 its anterior extremity to the end of the muzzle. The interparietal 

 large and elongate-hexagonal, in contact with the abbreviated point 

 of the preceding scale, and with the two frontoparietals; on each side 

 with a parietal, and behind with the occipital, which in turn borders on 

 the right and left with a postparietal larger than itself. Next to the 

 occipital are two rows of very small nuchal scales smilar to those on 

 the neck. Each supraocular region has five or six largo plates, which 

 embrace two or three smaller ones externally, which are bordered exte- 

 riorly by five superciliary plates. Nostril opening wide, situated in the 

 posterior part of the nasal, Avhich is subrectangular; this plate is in 

 contact anteriorly with the supranasal scute, and above with that of 

 the lirst prefrontonasal; below with the two first supralabials and 

 behind with the two superposed nasoloreals; loreal either single or 

 double, a larger above a smaller. The loreals are followed by one large 

 hexagonal preocular; next come three suboculars, the latter well devel- 

 oped as to length. There are ten supralabial plates; the first seven 

 are quadrilateral; of these the third, the fourth, and the fifth are the 

 highest; the eighth and ninth are pentagonal, and the tenth ends in 

 an acute angle; four pairs of inferior labials; the cheek scales are 

 smooth, imbricated, and polygonal. The ear aperture is triangular and 

 surrounded by granular scutella. Genial undivided and is followed, 

 on the right and left, by three large, smooth, submaxillary plates; 

 those of the first pair are in contact with each other on the internal 

 side, and all are separated on the opposite side from the inferior labials 

 by a row of scales. 



Lateral fold beginning under the eye and ending at the side of the 

 cloaca; the scales on the side of the neck are granular. The cervical 

 and dorsal scales are subrhomboid and of medium size; they constitute 

 fourteen longitudinal series and fifteen transverse from the nape of the 

 neck to the posterior border of the thighs; those of the vertebral 

 region are obtusely keeled or smooth, while those on the sides are 

 smooth. Yeutral plates of very nearly the same dimensions, subquad- 

 rilateral, with a bowed posterior border, forming twelve longitudinal 

 and forty-two transverse rows from the level of the arm to the anus, 

 which is bordered by four scutella. Tail with fifty-seven whorls of 

 scales, upper caudal scales more strongly keeled than those of the 

 dorsals. Limbs short; the anterior ones covered above with flat scales 

 and underneath with granular ones. The toes are protected above and 

 below by a series of scaly plates; the claws are short and curved. 



Measurements. — Total length of a specimen, with the tail, 149 mm.; 

 length of head from the end of the muzzle to the middle of the ear, 



