2/6 



2. Dorsal scales with a groove and two keels : 



34 scales round the body S- ^- iai'juus p. 278. 



B. Frontonasal divided; three large praeanals; ventral 



scales keeled 6. T. grayi p. 279. 



I. Tropidophorus beccarii (Ptrs.). 



Ainphixcstiis beccarii^ Peters, Mon. Berl. Akad. 1871, p. 574. 

 Tropidophortts beccarii^ Boulenger, Cat. Liz. Ill 1887, p. 360. 



Shields of head smooth; frontonasal single, slightly more broad 

 than long; praefrontals in contact; frontal as long as fronto- 

 parietals and interparietal together or a little longer; five 

 supraoculars, first longest, fifth smallest, fourth bordering the 

 eye; six or seven supraciliaries anterior to the fourth supra- 

 ocular; frontoparietals shorter than the interparietal; parietals 

 forming a suture behind the latter. Seven upper labials, fifth 

 and sixth largest and bordering the orbit; five lower labials; 

 a large postmental. Tympanum smaller than the eye-opening. 

 Body slender, with 30 smooth scales round the middle, ventrals 

 largest. Praeanal region covered with a single large plate. Tail 

 slightly compressed, one time and two fifths the length of 

 head and body, with smooth scales. Limbs rather long and 

 slender, the hind limb reaches the wrist or beyond; digits 

 short, with smooth lamellae below. 



Reddish-brown above, with dark transverse bands or alter- 

 nating spots; flanks white-spotted. Lower parts yellowish; 

 throat dark-spotted. Length of head and body 80 mm.; 

 tail 106 mm. 



Habitat: Borneo (Matang, Sarawak, Akar river, Baram 

 river, Bidi, Howong river!). 



2. Tropidophorus mocquardi Boulenger. 



Tropidophorus beccarii^ part., Mocquard, Nouv. Arch. Mus. (3) II 1890, p. 135. 

 Tropidophorus viocquardii^ Boulenger, Proc. Zool. Soc. 1894, p. 735. 



Head large, swollen at the temples; head-shields smooth; 

 frontonasal single; praefrontals in contact; frontal a little 

 longer than frontoparietals and interparietal together; five 

 supraoculars; frontoparietals shorter than the interparietal; 

 parietals in contact; seven upper labials, fifth and sixth largest 

 and below the eye, five lower labials; postmental smaller than 

 in the preceding .species, followed by two pair of shields. 

 Tympanum smaller than the eye-opening. Body slender, with 



