8. LTGOSOMA, 271 



little broader tlian lonp, forming a narrow suture with the rostral 

 and with the frontal ; latter .shield as long as frontoparietals and 

 interparietal together, in contact with the two or three anterior 

 supraoculars ; four supraoculars, first and fourth longest, second and 

 third e(iual ; six to eiglit supraciliaries ; frontoiiarietals and inter- 

 parietal distinct, subcqual ; parietals forming a suture behind the 

 interparietal, posterior border straight, at right angles with the outer 

 borders ; usually a pair of enlarged nuchals : fifth upi)ei- labial liclow 

 the centre of the eye. 4S to ")2 smooth scales round the middle of 

 the body ; laterals smallest. Pra^anals not enlarged. The adpressed 

 limbs overlap. Digits slightly compressed ; subdigital lamelUc 

 smooth, 23 to 29 uuder 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 marl)led with 

 grey. 



luillini. luilliui. 



Totnl length ... . 390 Fore lirali 4G 



Head 37 Hind limb 65 



Width of head 32 Tail (reproduced) . . 220 



Body 133 



Small islands near Mauritius. 



a. Several spec. : Round Islaud. Sir H. Barkly [P.]. 

 ad., hgv., & yg. 



b. Ad. Mauritius, Dr. Johnson [P.]. 



c-d Ad. ? Dr. J. E.Gray [P.]. (Types 



of Tiliqua bellii.) 



63. Lygosonia grande. (Plate XX. fig. 3.) 



Mocoa graudis, (Tnnj^ Cat. p. 272. 

 Mocoa? laxa, Hutton,^ Trans. N. Zeal. lust. iv. 1872, p. 169. 

 Lygosoma (Mocoa) nigriplantare, Peters, Man. Bcrl. 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. 8nout 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. Ear- 

 opening oval, a little smaller than the eye-opening, with a few 

 projecting granules anteriorlj-. 40 to 50 smooth scales round the 

 middle of the body : laterals smallest. Prseanals scarcely enlarged. 

 The hind limb reaches the wrist iu the adult, nearly to the axilla in 

 the young. Digits moderately elongate, subcylindrical ; subdigital 



