1861.] 



DR. A. GUTHER ON SIAMESE REPTILES. 



189 



A single anterior frontal shield 



belly. Three large prseanal scales, 

 (internasal) *. 



6. SiMOTES T^NIATUS. 



Scales in nineteen rows. Brownish-olive, with a brown longitu- 

 dinal dorsal band enclosing an olive-coloured line running along the 

 vertebral series of scales ; another brownish band along the side of 

 the body ; belly whitish, chequered with black. 



One loreal shield ; one anterior and two posterior oculars ; eight 

 upper labials, the third, fourth and fifth of which enter the orbit ; 

 155 ventral plates ; anal entire ; 44 pairs of subcaudals. Head with 

 the markings characteristic of the genus ; each half of the dorsal 

 band occupies one series of scales and two halves ; the lateral band 

 runs along the fourth outer series, touching the third and fifth. 



We were previously (Proc. Zool. Soc. 1860, p. 113) enabled to 

 enumerate 25 species of Siamese Reptiles, which number is raised 

 to 42 by the following list. 



Those which have been mentioned in the account of the first collec- 

 tion are marked with an asterisk. 



1 . Dracunculus maculatus. 



Gray. 



2. Draco tceniopterus, Gthr. 



3. Bronchocela cristatella, 



Kuhl. 



4. Acanthosaura armata. 



Gray. 



5. coronata, Gthr. 



6. capra, Gthr. 



*7. Calotes versicjlor, Daud. 



8. Dilophyrus mentager, Gthr. 



9. Leiolepis bellii, Gray. 



10. Tropidophorus microlepis,' 



Gthr. 



1 1 . Platyurus schneiclerianus, 



Shaw. 



1 2. Hemidactylus frenatus, 

 Schleg. 

 *13. Gecko verus, Merr. 



14. Cylindrophis rufa, Laur. 



15. Python reticidatus, ^chnoiA. 



16. Simotes taniatus, Gthr. 



17. Homalopsis buccata, L. 

 *18. Tropidonotus quincunciatus, 



Schleg. 



19. Dendrophis picta, Gm. 



20. Rana tigrina, Daud. 

 *21. Oxyglossus lima,Tsch\xi}ii. 

 *22. Biifo melanostictus, Schn. 

 *23. Polypedates maculatus. 



Gray. 



* This is the third species of Tropidophorus. The two others are : — 



1. Tropidophorus cochinchinknsis (Cuv.) : Diim. Bibr. v. p. 556. pi. 57. 

 f. 1. — Tropidosaurus montanus. Gray in Griffith, Anim. Kingd. ix. App. p. 35. 



Snout rather obtuse. Scales on the back strongly keeled, the keels terminating 

 in slightly elevated spines. Two series of moderately elevated spines along the 

 middle of the back of the tail, the series being continuous with those on the 

 back of the trunk. Tail with a band of large hexagonal plates below ; two large 

 prseanal scales. Two pairs of anterior frontal shields. 



Cochinchina. 



2. Tropidophorus grayi, n. sp. (T. cochinehinensis, Gray, not Cuv.). 

 Snout rather narrow and produced. Scales on the back as well as those on 



the tail with an exceedingly strong, lamelliform keel, elevated and spinous pos- 

 teriorly. Two series of spinous keels on the back of the tail, continuous with 

 those on the back of the trunk. Tail with rhombic scales below, which are not 

 much larger than those of tlie belly. Scales of the throat strongly keeled. Three 

 large pracanal scales. Two pairs of anterior frontal shields. 

 Philippine Islands. Three specimens in the British Museum. 



