8. LYGosoma. 271 
little broader than long, forming a narrow suture with the rostral 
and with the frontal; latter shield as long as frontoparictals and 
interparietal together, in contact with the two or three anterior 
supraoculars ; four supraoculars, first and fourth longest, second and 
third equal; six to eight supraciliaries; frontoparietals and inter- 
parietal distinct, subequal; parietals forming a suture behind the 
interparietal, posterior border straight, at right angles with the outer 
borders ; usually a pair of enlarged nuchals ; fifth upper labial below 
the centre of the eye. 48 to 52 smooth scales round the middle of 
the body ; laterals smallest. Praeanals not enlarged. The adpressed 
limbs overlap. Digits slightly compressed; subdigital lamelle 
smooth, 23 to 29 under the fourth toe, Tail about once and two 
thirds the length of head and body. Greyish or brownish olive 
above, with small darker and lighter spots or variegations ; yellowish 
white inferiorly, throat and sides of belly spotted or marbled with 
grey. 
milli. millim 
Total length.... . 390 Fore limb ........ 46 
Head .... ..... 37 Hind limb ........ 65 
Width of head.... 32 Tail (reproduced) .. 220 
Body .......... 133 
Small islands near Mauritius. 
a. Several spec. : Round Island. Sir H. Barkly [P.]. 
ad., hgr., & yg. 
b, Ad. Mauritius. Dr. Johnson [P.]. 
cd. Ad. —? Dr. J.E. Gray(P.]. (Types 
of Tikiqua bellit.) 
63. Lygosoma grande. (Prare XX. fig. 3.) 
; Mocoa grandis, Gray, Cat. p. 272. 
Mocoa? laxa, Hutton, Trans. N. Zeal. Inst. iv. 1872, p. 169. 
Lygosoma (Mocoa) nigriplantare, Peters, Mon, Berl. Ac. 1873, p. 744. 
Habit lacertiform; the distance between the end of the snout and 
the fore limb is contained once and one fourth to once and two thirds 
in the distance between axilla and groin. Snout moderate, obtuse. 
Lower eyelid with an undivided transparent disk. Nostril pierced 
in a single nasal; no supranasal; frontonasal broader than long, 
in contact with the rostral and with the frontal; latter shield 
as long as frontoparietals and interparietal together, in contact 
with the two anterior supraoculars; four supraoculars; seven or 
eight supraciliaries ; frontoparietals distinct, a little longer than 
the interparietal; parietals forming a suture behind the inter- 
parietal; a pair of nuchals and a pair of temporals border the 
parietals ; sixth upper labial below the centre of the eye. Har- 
opening oval, a little smaller than the eye-opening, with a few 
projecting granules anteriorly. 40 to 50 smooth scales round the 
middle of the body; laterals smallest. Preeanals scarcely enlarged. 
The hind limb reaches the wrist in the adult, nearly to the axilla in 
the young. Digits moderately elongate, subcylindrical ; subdigital 
