20 Catalogue of Reptiles inhabiting the 



the head, limbs and sides with numerous more or less distinct, irregular 

 dark brown spots ; in some younger individuals the tail with whitish 

 rings. Beneath yellowish white. 



Habit. — Malayan Peninsula, Pinang, Singapore. 

 Philippine Islands, Amboyna, Borneo. 



The Malayan Geckonidce have the power of somewhat changing the 

 ground colour, none however in a greater degree than the present spe- 

 cies. In the valley and on the hills of Pinang it is very numerous, 

 swarming at night in rooms, on the walls, and under the ceiling, occa- 

 sionally giving out a sound, resembling the monosyllable " Tok," repeated 

 G or 8 times with increased celerity. The aim of these lizards is by no 

 means unerring ; they frequently miss an insect, and fall from the 

 ceiling. Among themselves they are pugnacious : when two or more 

 covet an insect, the successful one has to defend its prize, or give it up 

 to the stronger. The new-born (with umbilical aperture) and adult 

 are of the following dimensions : 



New-born. Adult. 



Length of the head, Of If inch. 



„ trunk, Of 2f 



j> j> tail, lg^ Og 



Entire length, .... 2^ Gf inch. 



Sub-Gen. Ptychozoon, Kuhl. 

 Toes webbed to the last compressed joint ; thumbs nailless ; sides of 

 the head, body, limbs and tail with broad scaly membranes, those of 

 the tail anteriorly scalloped. Male with femoral pores. On the sides 

 scattered tubercles. 



Ptychozoon homalocephalum, (Creveld.) 



Syn. — Lacevta homalocephala, Creveld. 

 Gecko homalocephalus, Tilesius. 



T Fitzinger. 

 Ptychozoon homaloeepbalum, apud \ Wagler. 



LWiegmann. 

 Pteropleura horsfieldii, Gray. 



Platyilaetylus homalocephalus, Cuv. apud Diim, and Bibr. 

 Ptychozoon homalocephala, Kuhl. apnd Gray : Catal. 



Heath The ground colour yellowish green olive. Between the eyes 

 and muzzle a double figure, in whitish outline, representing in front a 



