54 



NEW AUSTRALIAN LIZARDS. 



Scales on the back large and increasing in size on the tail, the 

 post-occipitals with several obtuse denticles. The spines of the 

 scales as the latter recede from the occiput become gradually 

 fewer till on the tail they form 8 rows of single spines, the two 

 lateral rows on each side being much the longest. Limbs strong, 

 sub-equal in length, sequence of toes ^ ^ | ^ ^ 



Colour, reddish grey above with darker lines along the rows 

 of spines, and irregular light patches arranged sub-linearly, the 

 three medial rows being pretty regular. The ground colour 

 descends on the sides in irregular streaks. Beneath grey. 

 Total length 83 lines Length between the limbs 30 lines 



Length of tail 21 lines Length of fore limb 17 lines 



Length of head 13 lines Length of fourth toe 5 lines 



Breadth of head at ears 10 lines Length of hind limb 20 lines 

 ,, eyes 6 J lines Length of fourth toe Splines 

 Localty, Barcoo. This specimen was kindly contributed by 

 Mr. 0. W. De Burgh Birch, Count Zelling. As this gentleman 

 has on previous occasions shown his desire to promote zoology, 

 he is entitled to the compliment of having his name associated 

 with the species. The lizard agrees with S. depressxis, Gunther^ 

 in being much depressed posteriorly, and with aS'. Stokesii, Gr , in 

 the caudal scales being unispinous. In colouring it differs from 

 both. 



CEdura Tryois'I. — A large supranasal in contact by suture 

 with its fellow of the opposite side, or occasionally separated by 

 an intercalated frontal scale. The longitudinal and transverse 

 sutures between the rostral and supranasals form a cross upon the 



muzzle, Labials -j^the ninth under the pupil, the three symphysial 

 shields are the largest below. No infralabials. Scales large, espec- 

 ially on the back and postanal convexity, those of the under side 

 of the head a little smaller than those of the chest. Tail rounded, 

 conical, rapidly tapering. Head shorter than in O. marmorata. 

 The postanal swelling large with one large flat scale on each side, 

 sub-digital cushions of digits i to 3, single at the base and 

 in 3 pairs medial smaller than the terminals: of toes, 2, 3, and 4, 

 with two single at the base, and four pairs medial, poUex with a 

 single one in lieu of the distal pair. 



Colour above grey to dark-brown, the markings variable, 

 generally pale on a dark ground, occasionally the reverse, consist- 

 ing of ocellated spots more or less confluent and irregularly 

 scattered, or of obscurely defined pale-centred angular spots very 

 confluent, or round pale spots enclosed in dark cross bands oyer 

 the back and on the head, in lines converging to the nape, or of 

 pale irregular flecks on a dark ground with streaks from the ear 



