6i 



in contact with flat surfaces. The adhesive face of the egg is 

 soft, the other part is hard. 



Specimens without dorsal tubercles have been named Piy- 

 chozoon homalocephahini var. lionotwn by Annandale. 



2. Ptychozoon horsfieldi (Gray). 



Pteropleiira horsfieldii^ Gray, Phil. Mag. (3) II 1827, p. 56. 

 Ptychozoon homalocephalnni^ part., Boulenger, Cat. Liz. I 1885, p. 190. 

 Ptychozoon horsfieldii^ F. Miiller, Verb. Ges. Basel X 1892, p. 209 pi. IV. 

 Ptychozoon horsfieldii^ Flower, Proc. Zool. Soc. London 1896, p. 868. 

 Ptychozoon horsfieldii^ v. Lidth de Jeude, Notes Leiden Mus. XXV 1905, p. 189. 



Head oviform, snout longer than the distance from the eye 

 to the ear-opening; forehead concave; ear-opening triangular. 

 Head with small equal granules. Rostral large, quadrangular; 

 nostril bordered by the rostral, the first labial and three nasals; 

 the upper pair of nasals separated by a larger scale; above 

 the labials two other large scales on each side. Eleven upper 

 and as many lower labials; mental small, triangular; four chin- 

 shields on each side, inner forming a long suture with its 

 fellow. Body depressed, with small granules above, no tuber- 

 cles; a broad membrane on the sides. Throat granular; ventral 

 scales larger, cycloid, imbricate. Male with 7 — 12 praeanal 

 pores in an angular series, separated by 8 scales from 9 — 14 

 femoral pores on each side. Tail depressed, annulate, the sides 

 bordered by a series of dermal lobes, the tip not ending in 

 a broad flap; the lobes directed somewhat obliquely; upper 

 caudal scales granular, lower transversely enlarged. Limbs 

 depressed; digits strong, entirely webbed; the fore limbs bor- 

 dered by a broad dermal expansion, the hind limbs on the 

 posterior side of the femur and on both of the tibia. 



Brown above with broad, lighter cross bands, edged with a 

 dark wavy line; a broad dark streak from the eye to the 

 shoulder, sometimes broken up into round spots. Tail with 

 dark and light bands. Lower parts yellowish, uniform or spot- 

 ted with brown. Length of head and body 80 mm.; tail 75 mm. 



Habitat: Borneo (Nanga Raun!, Sarawak!, Mt. Dulit!). — 

 Penang (1900 feet); Singapore; Burma; Loo-Choo Islands. 



