190 GECKONIDiE. 



and tubercles : lower surfaces with small, slightly imbricated scales : 

 the parachute-membrane covered above with imbricated square 

 scales arranged like the bricks of a wall, scaleless inferiorly. Pupil 

 vertical. Males with praeanal pores. 

 East Indies. 



1. Ptychozoon homalocephalum. 



Ptychozoon homalocephala, Gray, Cat. p. 164. 

 Lacerta homalocephala, Creveldt, Mag. Naturf. Fr. JBerl. iii. 1809, 



p. 266, pi. viii. 

 Gecko homalocephalus, Tilesius, Mem. Acad. 'St. PStersb. vii. 1820, 



pi. X. 

 Ptychozoon homalocephalum, Kuhl, Isis, 1822, p. 475 ; Cantor, Cat. 



Mai. Rept. p. 20 ; Giinth. Rept. Brit. Ind. p. 105 ; Stoliczka, Journ. 



As. Soc. Beng. xxxix. 1870, p. 169. 

 Pteropleura horsfieldii. Gray, Phil. Mag. (2) iii. p. 64. 

 Platydactylus homalocephalus, Bum. 8f Bihr. iii. p. 339, pi. xxviii. 



tig. 6, & pi. xxix. figs. 1, 2, 



Head oviform ; snout longer than the distance from the eye to the 

 ear-ojDening, once and a half the diameter of the orbit ; forehead 

 concave; ear-opening rather large, subcircular. Body and limbs 

 moderate, depressed ; digits short, not very unequal, webbed to the 

 tips ; the fore limbs bordered on each side by a broad dermal 

 expansion ; a similar expansion bordering the tibia on each side, the 

 femur posteriorly only. The parachutes on the sides of the body 

 nearly as broad as the latter. Another dermal lobe on the side of 

 the head, below the ear-opening, from the angle of the mouth to the 

 neck. Tail elongate, depressed, the sides fringed with a series of 

 rounded lobes, confluent into a broad rounded flap at the extremity. 

 Head and back covered with small granular scales. Rostral large, 

 quadrangular ; nostral pierced between the rostral, the first labial, 

 and three small nasals ; ten to twelve upper and as many lower 

 labials : rostral smaU, sub triangular : three or four small chin -shields 

 on each side, inner elongate. Back with scattered convex tubercles 

 (absent in specimen h). Throat covered with small granules, belly 

 with moderate scales. An angular series of about twenty-five prae- 

 anal pores. Tail distinctly annulate, covered above with small flat 

 granular scales and transverse series of conical tubercles, inferiorly 

 with imbricated scales. Greyish or reddish brown above, with trans- 

 verse undulated dark brown bands ; a dark brown streak from the 

 eye to the first dorsal band. 



Total length 188 millim. 



Head 27 



Width of head 21 



Body 69 



Fore limb 34 



Hind limb 43 



Tail 92 



Java ; Borneo ; Sumatra ; Malay peninsula. 



