124 MR. G. A. BOUl.ENGER ON THK [Mar. 6, 



B. Digits not more than one-third webbed. 



U]5per surface of head covered with very large 



unequal, subeonical tubercles 4. trachyrh/nchus. 



Hinder part of the head with knob-like prom- 

 inences f>. cmricwlatus. 



II. A ciliated crest on each side, from the upper 



eyelid to the back fi. ciJiatm. 



7. Rhacodactylus leachiantjs. 



Platydactylus leachianus, Cuv. R. A., 2nd edit. ii. p. 54 ; Dum. 

 & Bibr. in. p. 3 '5, pi. 28 f. 6 ; Gray, Cat. Liz. p. 160 ; * Bavay, 

 Cat. p. 3. 



Hojilodactglus {Rhacodactylus) leachianus, Fitzing. Syst. Rept. 

 p. 100. 



* Rhacodactylus leachianus, Socage, Jorn. Sc. Lisb. iv. p. 201. 

 Head large, ovitorm, elongate ; forehead concave ; snout longer 

 than the aistaiice between the orbit and the ear-opening, a little 

 more than twice the diameter of the orbit ; ear-opening narrow, 

 horizontal. Body and limbs moderately elonQ,'ate, rather depressed ; 

 digits moderately elongate, broad, not very unequal, half-webbed ; 

 limbs bordered on each side by cutaneous folds, most developed on 

 the anterior side of the fore limbs and on the posterior side of the 

 hind limbs ; other cutaneous folds below the rami mandibulae, on the 

 sides of the neck, and from axilla to groin ; throat with a few cross 

 folds. Upper surface of head covered with small irregular polygonal 

 convex scales larger than the granules of the back, elongated and 

 more or less distinctly keeled on the forehead and snout ; rostral 

 twice as broad as high, with a more or less distinct median division 

 above ; nostril pierced between seven or eight small nasals and the 

 first upper labial; upper labials 17 or 18 ; lower labials 14 to 17, 

 anterior very high ; mental narrow, elongate wedge-shaped, about 

 the size of the proximal labials ; no regular chin-shields, but a few 

 larger scales pas.'«ing gradually into the minute granules of the throat. 

 Scales small, granular, smallest on the lower surfaces. [Males with 

 a lai-ge patch of prseanal pores\] Tail cylindrical, tapering, covered 

 with uniform, small, flat, juxtaposed scales arranged in verticils. 

 Grey or pinkish-grey above dotted and indistinctly marbled with 

 brown, sometimes with large whitish spots ; lower surfaces white, 

 uniform. 



millim. 



Total length 325 



Head 59 



Width of head 46 



Bodv 152 



Fore limb 70 



Hind limb 84 



Tail 115 



The largest species of the family Geckonidce at pre.-ent known. 

 This description is taken from two female specimens (one in the 



^ Dum. & Bibr. I. c. 



^ 



