4 SECOND YARKAND MISSION. 
tympanum , et in fasciculos acl latera colli et supra humeros dispositis ; caudalibus cat inati , 
mucronatis , verticillatis, dorsales magnitudine vix excedentibus ; stramineus, capita dots j 
posterior e nigro-punctatis , dorso anteriore nigro, stramineo transversim fasciato. 
1-7, Yangihissar, 8, Karglialik, south of Yarkand, both in the plains of Eastern Turkestan. 
Description. — General form 
apparently more slender than in Slellio caucasicus o 
S. tuberculatus ; body and base of tail depressed ; tail 1*5 times to nearly twice the en » ^ 
of the body ; the fore limb laid backward does not reach the thigh (except in very y° u 
specimens) ; the hind limb laid forward extends to about the ear. Head depressed , ^ 
length considerably exceeding its breadth. The largest specimen collected measures 
inches, of which the head and body from the snout to the anus measure 5 A, fore lhnh 0 
of toes 2'6 inches, hind limb nearly 4, third toe of hind, foot without the claw, measure! 
between the third and fourth toes, 0 - 65. In a smaller specimen the head and body measure 
tail 8 inches. . being 
The scales on the upper surface of the head are convex, those on the occipu ^ 
submucronate, those on the supra-orbital bosses are rather smaller and flat. Supra-oi ^ 
ridge and cantlms rostralis prominent, loreal region concave, bearing small scales, so ^ 
which, like most of the scales on the side of the head, are bluntly keeled. Nostrils c j r ^ ore 
backwards, situated in the hinder part of a single shield below the cantlms. Eostra^J^^ 
than twice as broad as high. Labials not much larger than tire neighbouring scales. 
the same breadth as the rostral and pointed below. Eyelids covered with small <■ ^ 
scales, those along the edges of the lids rather larger and pointed. Some rather _ 
scales bluntly keeled or submucronate between the eye and the tympanum. Some sj ^ 
scales round the tympanum : groups of spinose scales are scattered over the sides an ^ 
of the neck, the former being the larger. There is no trace of a crest. Sides of t ie 
between the larger scales covered with very small conically mucronate scales. p ee led 
Scales on the back of the neck granular, passing gradually into the bluntly 
scales of the middle of the back ; these are considerably larger than the scales of t o 
being about twice as broad. The scales on the lateral portions of the body are dis _ 
keeled, in tolerably well-marked transverse rows, and nearly uniform in size, but e caS ; 0 n- 
spicuously larger scales being scattered amongst them in general, though a few may oc^ 
ally be detected here and there, and these are patches of enlarged subspinose scales o ^ 
colour about the shoulders. There is no patch of enlarged scales in the middle of e 
Scales of the belly smooth, rhomboidal, about the same size as those in the midcl e ^ 
back, and arranged in transverse series, containing towards the middle of the belly 1 
eight to sixty-seven scales, tending, however, to pass into the keeled scales at the sic 
count about 150 to 160 scales round the middle of the body. The throat scales are 
scales are a little larger than those adjoining, but not thickened. There is no patch o ^ g p G cies 
scales in the middle of the abdomen, as there is in Stellio caucasicus, and several o e ^ ^ 
to those of the abdomen, but much smaller. 
In males there are two or three rows of thickened scales before the anus ; m 
;hickened. There is no patch c 
dlio caucasicus, and several ol- ^ eS pe- 
of the genus. All the limb scales are keeled, those above sharply, those below, a ad 
daily on the hind limb, faintly ; those on the hack of the thigh small, with a few ^ ® |] l0 se 
subspinose scales scattered amongst them ; scales below the feet keeled, very simi a^ gca ics, 
above ; toes covered beneath with transverse plates, each with several keels. 
