506 Mk. G. A. BOULENGER ON REPTILES AND [June 14, 



7. Varanus heteropholis, sp. n. (Plate XXIX.) 



Teeth acute, compressed. Snout depressed, obtusely pointed, 

 as long as the distance between the anterior cornet of the eye and 

 the ear ; canthus rostralis indistinct. Nostril an oblique slit, its 

 distance from the end of the snout thrice as great as from the orbit. 

 Digits rather elongate. Tail compressed, keeled above. Scales on 

 head rather large, flat, polygonal, subequal ; ten across the snout, 

 from nostril to nostril, four across supraocular region and three 

 across interorbital region ; the middle supraocular series somewhat 

 enlarged transversely ; temporal scales very small. Nuchal scales 

 very large, round, flat, mostly with a short faint keel^ widely sepa- 

 rated from each other by finely granular interspaces. Dorsal scales 

 feebly keeled, of very unequal sizes, those on the middle line smallest, 

 with two or three alternating series of very large oval ones on each 

 side ; a series of slightly enlarged scales on each side. Ventral scales 

 keeled, in about 80 transverse series. Caudal scales keeled, those 

 on the lower half twice as large as the others ; caudal keel with a 

 very low doubly toothed crest. Dark brown above ; a black 

 streak along each side of the anterior half of the nape, followed by 

 two crescentic black cross-bands on the nape and a thitd on the 

 back between the fore limbs : reddish brown beneath, throat 

 variegated with black. 



Total length 1040 millim. ; tail 510. 



A single specimen was received of this most remarkable new 

 species, which, though nearly allied to V. dumerilii, diff'ers from all 

 its congeners in the singular dorsal lepidosis, which somewhat recalls 

 that of another Bornean Reptile, Lanfhanotus borneensis, described 

 some 15 years ago from a single specimen obtained at Sarawak, and 

 as to the systematic position of which we are still much in the dark 

 owing to the imperfection of Dr. Steindachner's description. Some 

 time ago I pointed out the singular fact that tlie Frog and the Toad 

 with the longest legs known (^Rana jerboa and Bufo jerboa) are both 

 from Borneo. A parallel case of superficial resemblance is now 

 offered by the similitude in scaling between Varanus heteropholis 

 and Lanthanotus borneensis. 



8. Varanus salvator, Laur. 



9. Tropidophorus brookii, Gray. 



10. Cylindrophis rufus, Laur. 



11. SiMOTEs octolineatus, Schn. 



12. GONYOPHIS MARGARITATUS, PtrS. 



A single young specimen, with 233 ventrals and 108 subcaudals. 

 Three black streaks on the back of the head, one on each side 

 behind the eye, the third along the suture between the parietals. 



13. Tropioonotus gonsficillatus, Gthr. 



