165 



General Aspect. — Slender. Head moderately large ; snout as 

 long as the diameter of the orbit, with subangular canthus 

 rostralis ; nostrils below the canthus rostralis, a little nearer the 

 eye than the end of the snout; tympanum large, its width a 

 little less than the eye-opening. Upper head-scales large, sub- 

 equal, rugose and strongly keeled ; they are largest towards the 

 snout and on the canthus rostralis, smallest above the orbit. 

 Neck long, its sides strongly plicated and spinose ; nuchal crest 

 well-developed, composed of separate compressed spines. The 

 dorso-lateral fold with spine-like scales, which are largest on each 

 side of the neck ; a serrated ridge or crest along the back ex- 

 tending to about the first-third of the tail. Body much laterally 

 compressed, covered above with small keeled scales, which 

 are larger and most carinate on the middle of the back, and 

 more minute on the sides ; much larger isolated scales inter- 

 vening. Ventral scales small, smooth or very slightly keeled. 

 Limbs and digits very long, the adpressed hindlimb reaching 

 beyond the tip of the snout ; the length of the foot equal to the 

 length of the rest of the forelimb ; scales similar to those on the 

 back. A series of seventy pores extending along the whole 

 length of the thighs, uninterrupted in the pne-anal region. Tail 

 very slender, laterally compressed, more than twice as long as 

 head and body ; caudal scales equal, keeled, a few larger ones at 

 the base of the tail. 



Colour. — Dark oli\-e above, head and neck marked with much 

 oohraceous-yellow. Tail with alternately dark and light aiinuli. 

 Under-surface yellowish, median parts of the throat^ chest and 

 inner-surfaces of limbs black. 



Total length 



Head 



Body 



Tail 



Width of head 



Length of forelimb 



Length of hindlimb 



Amphibolukus scutulatus, sp. nov. PI. VIL, figs. 1 and 2. 



Between Fraser Range and Queen Victoria Springs. 



Of this species we have several specimens of each sex. At the 

 first glance it much resembles Amphibolurus cristatus, but differs 

 m the following respects : — 



All the scales are much smaller, the head-scales not rugose as 

 in A. cristatus, but smooth and strongly keeled. The dorsal 

 scales are not intermixed with larger ones, but increase in size 

 towards the vertebral line. The compressed spines of the nuchal 



340 



nmi 



22 



" 



83 



a 



235 



it 



20 



iC 



40 



u 



98 



a 



