1847.] Malayan Peninsula and Islands. 949 



vertical position, enclosed by two post-orbitals, one elongated prse-orbi- 

 tal, and beneath by the fourth upper labial ; the frenal is very small, 

 tetragonal ; the upper labials eight, rather high ; lower labials ten ; 

 on both jaws the shields increase in size towards the angle of the 

 mouth. The chin is covered with two pairs of elongated shields and a 

 few gulars. The mouth is small ; the posterior upper maxillary tooth 

 longer than the rest, furrowed, and the anterior lower maxillary teeth 

 also exceed the following. In addition to the fixed teeth there are 

 several accessory series. The trunk is nearly cylindrical, slightly 

 depressed, covered with small rhombic scales, smooth, and not imbri- 

 cate, disposed on the anterior part in 1 9, on the posterior part in 1 7 

 longitudinal series. The tail is short, conic, tapering and slightly 

 prehensile. Two individuals, taken at different times in rivulets in the 

 valley of Pinang, in habits resembled H. rhinchops. The larger was 

 of the following dimensions : 



Length of the head, ft. 1| inch. 



Ditto ditto trunk, 1 5 



Ditto ditto tail, , 2f 



1 ft. 8| inch. 

 Circumference of the neck, If, of the trunk, 2f, of the root of the 

 tail, 1^- inch. 



Homalopsis leucobalia, Schlegel, Var. (See Plate XL. Fig. 5.) 



Young. — Above light brownish olive, or greenish grey with single 

 irregular distant brown spots ; lips and throat whitish yellow ; the 

 lowest three or four lateral series of scales, and the abdominal surface 

 greenish white or pearl-coloured. 



Adult. — Uniformly blackish olive above, otherwise like the young. 

 Iris dark brown ; pupil elliptical, vertically contracted by the light. 

 Tongue whitish. 



Scuta 130 to 148 ; Scutella 26 to 37. 



Habit. — Pinang, Malayan Peninsula. 



The head is very broad, depressed, and the muzzle blunt ; the ros- 

 tral broad, hexagonal, very slightly arched beneath ; the superior 

 margin borders the single small elongated anterior frontal, which is of 

 a narrow hexagonal form, broader behind, where it is wedged in between 

 the twojn-oad frontals. The nasals arc rather large; nostrils small 



G g 2 



