146 GBCKONIDJE. 



surface of the tail a row of broad band-like plates. On each side 

 near the vent an oblique row of three spine-like prominent scales. 

 Neither preeanal nor femoral pores." 



" Grey-brown, with brown transverse band-like spots." 



Goyaz, Brazil. 



26. ARISTELLIGEE. 



Aristelliger, Cope, Proc. Ac. Philad. 1861, p. 496. 

 Idiodactylus, Bocourt, Miss. Sc. Mex., Rept. p. 41. 



Digits slender at the base, free, strongly dilated at the extremity, 

 furnished with undivided transverse lamellse inferiorly ; distal pha- 

 langes, except of thumbs, free, elongate, compressed, raised, clawed ; 

 inner digits short, scarcely dilated at the base, the apex dilated into 

 a small disk with a circular plate inferiorly, and provided with a 

 sheathed retractile claw, the sheath opening laterally and inwards. 

 Upper 8urfa,ces covered with granular scales ; belly with cycloid 

 imbricated scales. Pupil vertical. Eyelid distinct all round the 

 eye. No femoral nor praeanal pores. 



West Indies : Central America. 



1. Aristelliger prsesignis. 



Hemidactylus prsBsignis, Hallow. Proc. Ac. Philad. 1856, p. 222. 



Aristelliger praesignis, Cope, I. c. 



Idiodactylus georgeensis, Bocov/rt, I. c. pi. x. fig. 1. 



Head moderate, elongate ; snout obtusely conical, considerably 



longer than the distance between the eye and the ear-opening once 



and two thirds or once and three fourths the diameter of the orbit ; 



ear-opening moderate, pval, oblique, its greatest diameter about half 



that of the orbit. Body and limbs moderate ; digits unequal ; about 



thirteen lameU® under the fourth toe. Head and upper surfaces 



covered with small Granular scales; abdominal scales moderate. 



Upper eyelid with a/ small spine-like scale. Eostral broad, with 



median cleft above, entering the nostril; eight upper and as 



many lower labials ; mental large, pentagonal, extending bevond 



the labials, bordered on each side by a small chin-shield. "Tail 



slender, cylindrical, tapering, compressed distally, longer than head 



and body, covered above with small, flat, slightly imbricated scales, 



inferiorly with a central series of transversely dilated plates. 



Brown above, generally with darker cross bars on the back and tail 



and a dark spot above axilla ; sometimes with whitish dots ; a dark 



streak on each side of the head, passing through the eye; lips 



white-spotted ; flanks reticulated with dark brown ; lower surfaces 



whitish, throat with brown marblings or oblique streaks. 



Total length 226 millim. 



Head 28 



Width of head 21 ',' / 



Body '68 " 



