40 GECKONID-IE. 



the latter in contact with another series of equally large shields ; 

 8ymphysial small. Tail short, rounded, vertically oval, ending in 

 a very obtuse point, probably prehensile. Male ^ith 21 prseanal 

 pores in an angular series. Brown above, with two dorsal series 

 of more or less distinct lighter, dark-edged roundish spots ; some- 

 times scattered "white dots on the sides of the body ; upper lip 

 whitish ; lower surfaces whitish, brown-dotted. 



From snout to vent 94 millim. ; tail 63. 



The type specimen of this remarkable Gecko is stated to be 

 fx'om Singapore, where jNlr. Ridley has also collected it. The 

 species has recently been obtained in some numbers from the 

 Larut Hills in Perak and is also known from Borneo. 



Genus HEMIDACTYLUS. 

 Gray, Auu. Phil. (2) x, p. 199 (1825). 



Digits free or more or less webbed, the base dilated and bearing 

 two rows of lamellae beneath ; the two distal phalanges compressed 

 and slender, rising from within the extremity of the dilated portion ; 

 all the digits clawed. Dorsal lepidosis uniform or heterogeneous. 

 Pupil vertical. Males with prteanal or femoral pores. 



Southern Europe, Southern Asia, Africa, Tropical America, 

 Polynesia. 



Geckos of this genus ai*e the commonest of the house lizards in 

 the Peninsula and are known as Chi-chah. 



Si/noj^isls of the Species. 



1. Digits free or with a rudiment of web. 



A. Slender compressed joint of inner digit 



very short; 4 or 5 lamellae* under the 

 hallux, 9 or 10 under the fourth toe ; 

 dorsal granules vmiform or with scat- 

 tered, small, round convex tubercles . . H.frenat/is, p. 41. 



B. Slender compressed joint of inner digit 



at least half as long as dilated portion. 



1. Strongly keeled or trihedral dorsal 



tubercles. 



4 to 6 lamellse mider the hallux, G to 8 under 



the fourth toe ; tail rounded at the sides ; 



males with 8 to 20 femoro-proeanal pores on 



each side H. hraoJdi, p. 42. 



6 or 7 lamellas under the hallux, 10 or 11 under 

 the fourth toe : tail with sharp denticulated 

 lateral edge ; males with 17 or 18 femoral 

 pores on each side II. dcpressus, p. 43. 



* Counted lougitudinally, each pair reckoned as one. 



