146 GECKONID-E. 



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 prseanal nor femoral pores." 



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



Goyaz, Brazil. 



26. ARISTELLIGER. 



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

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



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

 furnished with undivided transverse lamella3 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 surfaces covered with granular scales ; belly with cycloid 

 imbricated scales. Pupil vertical. Eyelid distinct all round the 

 eye. No femoral nor prseanal pores. 

 West Indies ; Central America. 



1. Aristelliger prsBsignis. 



Hemidactylus prsesignis, Halloio. Proc. Ac. Philad. 1856, p. 222. 



Aristelliger prsesignis, Cope, I. c. 



Idiodactylus georgeensis, Bocourt, 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, oval, oblique, its greatest diameter about half 

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

 thirteen lamellce under the fourth toe. Head and upper surfaces 

 covered with small granular scales ; abdominal scales moderate. 

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

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

 many lower labials ; mental large, pentagonal, extending beyond 

 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 milHm. 



Head 28 „ 



Width of head 21 „ 



Body 68 „ 



