200 sciNcrD^. 



parent disk. Nostril pierced in advance of the vertical of the sutnre 

 between the rostral and the first labial ; a postnasal ; anterior loreal 

 in contact with the first labial ; supranasals usually in contact behind 

 the rostral ; frontonasal scarcely broader than long, touching the 

 frontal ; latter scarcely shorter than the frontoparietals and inter- 

 parietal together, in contact with the second and third supraoculars ; 

 four supraoculars : frontoparietals distinct, a little larger than the 

 interparietal ; parietals in contact behind the latter shield ; a pair 

 of nuchals ; four labials anterior to the subocular, which is mucli 

 narrowed infcriorly, the fourth labial very long and angular pos- 

 teriorly. Three pointed lobules on the anterior border of the ear. 

 Doisal and lateral scales quinijuecarinatc , 30 scales round the body. 

 The hind limb reaches the axilla. Subdigital lamellaj smooth. Tail 

 twice as long as head and body. Ochreous-brown above, with four 

 rows of black, white-dotted spots ; a black lateral band, edged 

 inferiorly by a white streak ; lower surfaces white. 



miUim. millim. 



Total length 176 Fore limb 16 



Head 12-5 Hind limb 29 



Width of head 7 Tail 117 



Body 46-5 



St. Augustin's Bay, Madagascar. 



65. Mabuia gravenhorstii. 



Euprepis bistriatus. Gray, Cat. p. 115. 

 Tiliqua bistriatus {imn Spix), Gray, Griff. A. K. ix. Syn. p. 70. 

 Euprepes gravenhorstii, Dmn. Sf Bibr. v. p. 686 ; Gravenh. N. Acta 



Ac. Leo^i.-Carol. xxiii. 1851, i. p. 335, pi. xxxiii. 

 (Euprepes) bistriatus, Bocttg. Abh. Senck. Ges. xii. 1881, 



p. 455. 



Snout short, obtuse. Lower eyelid with a large undivided trans- 

 parent disk. Nostril pierced just above or in advance of the vertical 

 of the suture between the rostral and the first labial ; a postnasal ; 

 anterior loreal in contact Avith the first labial ; supranasals usually 

 in contact behind the rostral ; frontonasal broader than long, usually 

 in contact with the frontal ; latter much shorter than the fronto- 

 parietal and interparietal together, in contact with the second, or 

 second and third (or first, or first and second) supraoculars ; four 

 or three supraoculars, t-he first and second frequently fused to a 

 single shield ; three or four supraciliaries ; frontoparietals fused to 

 a single shield, as long as or longer than the interparietal ; parietals 

 usually forming a suture behind the latter shield ; four or five 

 labials anterior to the subocular, which is much narrowed inferiorly 

 (exceptionally not reaching the lip), and forming a long obliquely 

 curved suture wHh the elongate fourth (or fifth) labial. Ear-opening 

 about as large as the transparent palpebral disk, anteriorly with 

 three or four short pointed lobules. Xurhal, dorsal, and lateral 

 scales strongly quinque- to septemcarinate ; 30 to 36 scales round 



