Dec. 1915. ON REPTILES AND BATRACHIANS FROM 24:7 
THE COAST AND ISLANDS OF SOUTH-EAST SIAM. 
It is of sluggish disposition, but will bite viciously when caught. It 
feeds upon small mammals and other snakes. 
31. DRYOPHIS PRASINUS, Boie. 
Blgr, Fascic. Malay. Zool., J., p. 165 (1903) ; Mocquard, Les Reptiles 
de l’Indo-Chine, p. 49 (1907) ; Smith, Jour. Bombay N. H.S., XXIII., 
p. 785 (1915) 
One example from Koh Chang and another from Koh Kut, both 
stone-grey in colour. The one from Koh Chang, a male, was an un- 
usually large specimen. It measured 1985 mm. in total length, the tail 
forming 725 mm. 
52. CHRYSOPELEA ORNATA, Shaw. 
Blgr, Fascic Malay. Zool., I, p 166 (1903) ; Mocquard, Les Reptiles 
de l’Indo-Chine, p. 49 (1907) ; Smith, Jour, Nat. Hist. Soe. Siam, I, 
p. L7a (iol). 
Two examples of this beautiful snake were obtained at Klong 
Yai, and a third on Koh Chang. 
33.  HYDROPHIS TUBERCULATUS, Anders. 
Distira tuberculata, Boulenger, Cat. Snakes, Brit. Mus, Vol. I, 
p. 293 (1896). 
Distira cyanocincta. Wall, Mem. Asiat. Soc., II, No. 8, p. 220 (1909). 
One example from Klong Yai, for the identification of which 
we are indebted to Mr Boulenger. As only a very few specimens of 
this snake are yet known toscience, we append a description of our 
specimen. 
Head small; eye less than its distance to the mouth; rostral broader 
than deep; nostril connects by suture to 2nd labial; frontal a little 
longer than broad, much shorter than the parietals; 1 prae- and 1 post- 
ocular ; a large anterior temporal; 7 and 8 supralabials, the 3rd and 4th 
entering the eye, 1 to 4 entire, the remainder divided horizontally; 4 large 
infralabials, the first 8 in contact with the chin-shields ; 2 pairs of well 
developed chin-shields, in contact with each other. Marginals after the 
2nd infra-labial. Costals 52 anteriorly, 38 at the greatest diameter of 
the body, sub-imbricate, with a short, faint keel, sometimes broken in 
two. Diameter of neck about half the diameter of greatest thickness of 
body. Ventrals 308, small,equal to or less than two adjacent costals, 
faintly bicarinate, the keels sometimes broken in two. 
Colour: Greenish white, with 55 broad black bands, which are 
broader than their interspaces. Head black with yellow markings. 
