Travels in the Central Parts of Indo-China (Siam), Cambodia, and Laos (Vol. 2 of 2) / During the Years 1858, 1859, and 1860

by Henri Mouhot

LIST OF THE NEW SPECIES OF REPTILES DISCOVERED BY THE LATE M. MOUHOT IN SIAM AND CAMBODIA.

By Dr. Albert Günther.

a. Tortoises.

1. Geoclemys macrocephala.

REPTILES.

The shell oblong, rather depressed, entirely three-keeled, olive-brown: the keels subcontinued, nearly parallel; the middle one higher and more distinct behind; the lateral ones, near the upper edge of the shields, continued, ending abruptly on the hinder edge of the third lateral discal shield: the hinder lateral and central shield only marked with a slight convexity: the margin entire, yellow edged: the under side yellow, with black triangular spots: the sternum flat, very indistinctly keeled on the side.

Animal black olive, head large; crown flat, covered with a single smooth plate, purplish-brown, with two streaks from middle of the nose; the upper edging the crown, the other the upper part of the beak, and with two streaks from the hinder edge of the orbit; the lower short and interrupted, extended on the temple; the upper broader and continued over the ear, along the side of the neck; two close streaks under the nostrils to the middle of the upper jaw, and two broad streaks dilated behind, down the front of the lower jaw, and continued on the edge of the lower jaw behind: the nape and hinder part of the side of the lower jaw covered with large flat scales: the rest of the neck and legs covered with minute granular scales: the front of the forelegs covered with broad band-like scales: the toes of the fore and hind feet rather short and thick, covered above with broad band-like scales. (Gray, Proc. Zool. Soc., 1859, p. 479, pl. 21.)

2. Cyclemys Mouhotii.

Shell oblong, pale yellow; back flattened above, with a dark-edged keel on each side: the vertebral plates continuously keeled, and rather tubercular in front: the margin strongly dentated: nuchal shield distinct. (Gray, Ann. and Mag. Nat. Hist., 1862, x. p. 157; Günth., Rept. Brit. Ind., pl. 4, fig. D.)

3. Trionyx ornatus.

Back of the young animal, in spirits, brown, with large, unequal-sized, irregularly disposed black circular spots: head olive, with symmetrical small black spots on the chin, forehead, and nose: throat and sides of neck with large, unequal-sized, irregular-shaped, and nearly symmetrically disposed yellow spots: legs olive, yellow spotted in front: sternum and under side of margin yellow: sternal callosities not developed.

A single specimen has been found by M. Mouhot in Cambodia, which is now in the British Museum. (Described by Dr. J. E. Gray, Proc. Zool. Soc., 1861, p. 41, pl. 5.)

b. Lizards.

1. Draco tæniopterus.

Tympanum not scaly: nostrils above the face-ridge directed upwards: a low longitudinal fold on the neck: scales on the back of equal size, obscurely keeled: gular sac covered with large smooth scales, uniformly coloured: wings dark-greenish olive, with five arched black bands, not extending to the margin of the wing, some being forked at the base. (Günth., Proc. Zool. Soc., 1861, April 23, and Ind. Rept., p. 126, pl. 13, fig. E.)

2. Acanthosaura coronata.

The upper orbital edge serrated, without elongate spine posteriorly; a short spine on each side of the neck; a yellowish-olive band edged with black across the crown, from one orbital edge to the other; an oblique, short, yellowish band, broadly edged with brown, from below the orbit to the angle of the mouth.

This and the following species belong to the genus Acanthosaura, as defined by Gray (Catal. Liz. p. 240). The tympanum is distinct; a short spine between it and the dorsal crest, which is rather low; no femoral or præanal pores: a short spine behind the orbital edge, and separated from it by a deep notch: back and sides covered with small smooth scales, slightly turned towards the dorsal line, and intermixed with scattered larger ones which are keeled: belly and legs with larger keeled scales: tail slightly compressed at the base, the rest being round, and without crest; all its scales are keeled; those on the lower side being oblong, and provided with more prominent keels: throat without cross-fold, and without distinct longitudinal pouch: a slight oblique fold before the shoulder. (Günth., Proc. Zool. Soc., 1861, April 23, and Ind. Rept., p. 149, pl. 14, fig. E.)

3. Acanthosaura capra.

The upper orbital edge not serrated, terminating posteriorly in a long moveable horn: no spine above the tympanum or on the side of the neck: nuchal crest high, not continuous with the dorsal crest, which is rather elevated anteriorly: crown and cheek without markings.

The tympanum is distinct: no femoral or præanal pores: back and sides covered with small smooth scales, which become gradually larger and more distinctly keeled towards the belly: no large scales intermixed with the small ones; only a few appear to be a little larger than the rest: tail slightly compressed at the base, surrounded by rings of oblong, keeled scales: throat expansible; a very slight fold before the shoulder. (Günth., Ind. Rept., p. 148, pl. 14, fig. F.)

4. Physignathus mentager.

Dorsal crest not interrupted above the shoulder; interrupted above the hip: caudal crest as high as that on the back: no large scales on the side of the neck: sides of the throat with large convex or tubercular scales.

A high crest, composed of sabre-shaped shields, extends from the nape of the neck to the second fifth of the length of the tail, being interrupted above the hip: scales on the back and the sides of equal size, very small, with an obscure keel obliquely directed upwards; those on the belly smooth, on the lower side of the tail rather elongate; strongly keeled: tympanum distinct: throat with a cross-fold: orbital edges and sides of the neck without spines: tail transversely banded with black.

One stuffed specimen is 30 inches long, the tail taking 21. (Günth., Proc. Zool. Soc., 1861, April 23, and Ind. Rept., p. 153, pl. 15.)

5. Tropidophorus microlepis.

Snout rather narrow and produced: scales on the back strongly keeled, the keels not terminating in elevated spines: back of the tail with two series of moderately elevated spines, the series not being continuous with those on the back of the trunk: scales of the throat smooth, or very indistinctly keeled: tail with a series of plates below, which are much larger and broader than the scales of the belly: three large præanal scales: a single anterior frontal shield (internasal). (Günth., Proc. Zool. Soc., 1861, April 23, and Ind. Rept., p. 76, pl. 10, fig. A.)

c. Snakes.

Simotes tæniatus.

Scales in nineteen rows. Brownish-olive, with a brown longitudinal 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. (Günth., Proc. Zool. Soc., 1861, April 23, and Ind. Rept., p. 216, pl. 20, fig. A.)

d. Newts.

Plethodon persimilis.

Black, white-speckled, the specks closer and more abundant on the sides; the hind-toes elongate, unequal. Tail compressed.

This is the first species of Newts which has been discovered in Continental India; it is exceedingly like the Pl. glutinosus from North America, but the hind toes are rather longer and more slender. (Gray, Proc. Zool. Soc., 1859, p. 230, c. tab.)