29-1 Notices and Descriptions of various Ueptiles. [No. 3. 



anterior froiitals very small ; the supra-orbitals larger than the 

 vertical plate. Canines above and below well developed. Tail 

 suddenly tapering. Colour a dull somewhat ferruginous brown 

 above, a little marked with black andjwhite shewing between the 

 scales ; a broad dark lateral band throughout, and above it an obscure 

 pale band: lower-parts buffy yellowish-white, with a narrow dark 

 lateral band on each side, and the rest thickly sprinkled over with 

 minute black specks. Head with a narrow black median line over 

 the frontal and vertical plates, and another over the supra-orbital, 

 meeting its opposite on the occipital and continued to the nape : 

 black lines also border the lips and pass through the eye. Seven- 

 teen rows of scales: scuta? 17 1, 175; scutellse 56, G4 pairs. Length 

 of one 18f in., of which tail 3i in. Prom Asam and the vicinity of 

 Darjiling ; Mr. Robinson and Capt. Sherwill. 



D. monticola, Cantor, P. Z. S. 1839, p. 53. Affined to D. tri- 

 gonota in structure. Brown above, pearly-white below, separated 

 by a broad black streak behind the eye : lowermost row of scales 

 black-bordered for the anterior third of the body; and traces of 

 other lines towards the head. Fifteen rows of scales: scuta? 158, 

 193; scutellse 82, 10G pairs. Length of one 22 in., of which tail 

 71 in. Hab. Asam ; Mr. Robinson. 



D. nigromarginata, nobis, n. s. Also affined to D. trigonota, 

 with median row of dorsal scales broad and hexagonal. No elon- 

 gated teeth. Colour throughout green above, the distensible skin 

 black between the scales ; yellowish-white below. Twenty-one 

 ranges of scales: scutas 252; scutelhe 132 pairs. Length of one 

 42 in., of which tail 1 1 in. Hab. Asam. Mr. Robinson.* 



* D. trigonota, the most common species of India proper, attains to about 6 

 ft. in length, but is rarely met with so large, and preys (at least those of medium 

 size) chiefly on the Calotes versicolor in L. Bengal. Vertical shield as broad 

 as in the Malayan D. multimaculata, not less so as represented in Dr. Schlegei's 

 plate. The markings are ill represented by Russell, who figures the young. The 

 very young (about 9 in.) are of a pale ashy colour, with but slight traces of the 

 markings of the adult ; a faint lateral band consisting of three parallel somewhat 

 darker lines is continued throughout the length, also a medial and two lateral 

 abdominal lines, besides which the under-parts are very minutely speckled. There 

 is a white median frontal streak bordered with black, continued into a black occi- 



