1875. ] DR. A. GUNTHER ON INDIAN REPTILES. 227 
becomes lower posteriorly on the trank, but is continued to the 
basal portion of the tail in the male, whilst it disappears behind 
the middle of the trunk in the female. Scales on the side of the 
body exceedingly large, nearly four times the size of those on the 
abdomen ; a transverse series in the middle of the trunk is com- 
posed of not more than seven scales. A fold in front of the 
shoulder. 
An immature male (body 4 inches long) is green, with five broad 
black cross-bands, each scale within the bands having an orange- 
coloured spot in the middle; tail with broad blackish rings; lips 
yellowish green. 
In an adult male (body 53 inches long) only traces of the two 
middle bands remain, nearly the whole of the upper parts being 
uniformly green ; lips yellowish. 
The adult female is uniform green. 
Three specimens were found by Col. Beddome at the foot of the 
Canoot Ghat ; the largest is 18 inches long, the body measuring 54 
inches. 
ONYCHOCEPHALUS ACUTUS. 
I do not find any character by which O. malabaricus (Beddome) 
can be distinguished from this species. 
STILYBURA. 
The following is a synopsis of all the species known, prepared 
with the assistance of the numerous examples in Col. Beddome’s 
collection. 
I. Scales in nineteen rows. 
A. Ventral scutes 205-214. Snout pointed; nasals not separated 
by the rostral. Caudal disk convex. Sooty black above, 
reddish below, the two colours encroaching upon each other 
in a zigzag line, and the black forming cross bars on the 
anterior part of the abdomen; a reddish spot on the cheek. 
1. Silybura grandis 
(Beddome): Anamallays, 4000 feet. 
B. Ventral scutes 166-169. Snout pointed; nasals separated by 
the rostral, which is about as long as the vertical. Head 
very small; vertical rather broad. Caudal disk more or less 
convex. Upper parts reddish violet or purplish, with irre- 
gular transverse rows of (sometimes very indistinct) yellowish 
ocellated specks. Abdomen deep black, this colour being 
separated from that of the upper parts by a yellow band 
commencing at the angle of the mouth, and broken up in 
spots behind, or entirely replaced by an irregular row of spots. 
A yellow band on each side of the lower part of the tail. 
2. S. melanogaster, sp. n, 
(Plate XXXI. fig, A.) 
Two specimens from the Anamallays and Travancore. 
lo* 
