154 
ZOOLOGY OF THE FAR EAST. 
or 5. The variation in colour is perhaps due to local causes. I have specimens of 
three colour-varieties before me ; they differ as follows : — 
{A) The whole of the head, body and tail is profusely marked with small round 
black spots not more than a millimetre in diameter. 
(B) The whole animal is of a pale brown colour with a relatively small number 
of large black spots and blotches, as a rule of irregular shape, on the dorsal and 
lateral surfaces. 
(C) The colour is practically uniform, without dark spots or blotches. 
The first of these colour-forms seems to be common in the Malay Peninsula, 
where it has been found at Ipoh in Perak and at the base of Bukit Besar in the 
Siamese Province of Patani. I have received a specimen from Perak in exchange with 
the British Museum. Van Kampen records somewhat similar specimens, but with 
the ventral surface white, from Sumatra. The second form is common in jungle- 
streams on the Dawna.Hills in Tenasserim, w^hile the third was described by van Kam- 
pen from Java. He has been kind enough to send me specimens. 
It is possible that these three forms actually represent distinct species, but this 
seems to be improbable. The variation in proportions is not correlated wdth geogra- 
phical records, and in specimens from the Dawna Hills I found that the tail was 
frequently shortened by injury, and that it was not always clear, when the wound 
had healed, to what extent the proportions had been changed. 
The specimens obtained by Mr. Robinson and myself at the base of Bukit Besar 
in igoi were living in a fairly deep pool in a small stream in open country^ and were 
observed to rise to the surface from time to time, while in the Dawna Hills Dr. 
Gravely and I found, on separate occasions, the form with large spots common under 
stones in very small rapid streams in rather dense jungle. Dr. van Kampen's speci- 
mens from Java were found in clear rapid-running brooks. As van Kampen has 
pointed out, the mouth-parts of this larva do not differ materially from those of the 
European species of Pelohates as figured by Boulenger. It is all the more remarkable, 
therefore, that in the Dawna Hills we found in the same part of the same streams a 
species of M egalophrys-laiva in which the mouth had the peculiar fimnel-like struc- 
ture of that of M. Montana and other species of the genus. 
Mcgalophrys montana, Kuhl. 
(Plate VI, figs. 10). 
1912. Megalophrys montana, Boulenger, op. cit., p. 277. 
Larva. 
1912. Megalophrys montana, Annandale, Rec. Ini. Miis. Vlll, p. /,o, tig. i. 
Measurements : — 
Length of body . . . . . . . . 11 mm. 
Breadth of body . . . . . . • • 5'5 
Length of tail . . . , . . . . 22 ,, 
Depth of tail . . . . . . , . 6 , , 
