128 
F. Stoliczka — On Indian Lizards. 
[No. 2, 
one type species, but unless direct transitions, or transmutations, from one form 
into the other had been proved by observations, we have no right to ignore the 
distinctions which had been pointed out, and which do in reality exist. 
M. Sikkimensis appears to be, however, more closely related to Mocoa 
SeJilegelii, Gunther (1. c., p. 86), which also has been described from a Sik- 
kim specimen. In size, form and general structure there does not appear to 
be a great difference between the two ; the number of longitudinal rows of 
scales round the body is given as 25, and that between the axil and groin 
as 35, the latter number is, however, too small for Sikkimensis. The colour 
of Schlegelii is said to be black above, blackish below, which I certainly 
never observed among a few hundreds of Sikkimensis. 
Mocoa sacka, n. sp. # 
PI. iv, fig. 4, side view of the animal, natural size ; 4a, 46, 4c, upper, side, and lower 
views of the head and neck, enlarged. 
Habit slender, head somewhat depressed, obtuse in front, body shorter 
than the tail, the latter gradually tapering to a point. No supranasals, eyelid 
with a perfectly transparent disc ; scales in 22 longitudinal series round the 
middle of the body, and in 40 transverse series between fore and hind-limb. 
Head shields regular, like in Sikkimensis, but the postnasal scarcely reaches 
the top of head, and the fifth upper labial is comparatively longer than in 
that species. A few enlarged scales behind the occipitals. Subeaudals single, 
enlarged, except the two first pairs. A pair of large preanals. Ear in front 
denticulated with three equal lobules. 
Total length 3.37 inches of which the tail is 2* ; feet slender ; the fore foot 
reaches to the middle of the eye, when laid forward, the 3rd and 4th fingers are 
equal or subequal ; the hind foot is two-third the distance between fore 
and hind limb, or half that between the latter and the ear ; the 4th toe is 
slightly longer than the 3rd. 
Above, light iridescent bronze brown, with a few dark brown spots 
scattered on the head and body, each of these dark spots being accompanied 
by an indistinct pale spot, on both, or only on one side ; a narrow black band 
from the rostral through the eye, passing above the ear and becoming 
indistinct on the sides of the belly ; a white band below the black, best marked 
through the ear and above the fore foot, but becoming also indistinct on 
the belly where a few whitish spots separate the lower light from the upper 
darker parts ; labials somewhat spotted with dark ; chin white ; breast and 
belly, below, greenish iridescent white ; femoral region and tail below pale 
vermilion, that colour passing also on the sides of the tail, where only a few 
indistinct pale spots exist. 
This species is very closely allied to Sikkimensis, differing from it by 
its more slender and comparatively longer hind feet, smaller number of 
# See Proc. A. S. B., September 1871, p. 195. 
