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Ptychozoon, Kuhl. 



Fino-ers and toes dilated in their whole leno;th, with a series of 

 undivided pneumatically adhesile plates below. Four claws to 

 each foot. Back granular, with larger tubercles interspersed. 

 Skin of side expanded into a flap or curtain. 



P. homalocephalum, Creveldt. 



Back with four or six rows of small tubercles longitudinally 

 traversinof the more numerous smaller scales. Tail without 

 enlarged sub-caudals. PrtTeanal pores 23 in a slightly angular 

 series. Colour, head yellowish green olive, a transverse band in 

 whitish outline before the eyes united by a narrow stem to an 

 anterior arrow-head mark. On the vertex a fonr-rayed rectangu- 

 lar star, with pale outline. A dark band from behind the eye 

 to the shoulder margined above with white. Lips white. The 

 membranes of the cheeks pale flesh colour, with dark blue spots, 

 and the interstitial skin pale lilac. Back same colour as head, 

 but passing on the sides into dark reddish brown, with 4 or 6 

 transverse M-shaped dotted lines. Tail and limbs with broad, 

 distant indistinct pale transverse bands. On each elbow a 

 whitish ring:. Beneath whitish, throat and inside limbs brown- 

 spotted. A Kamorta specimen described by Stoliczka was pale 

 purplish brown, marbled with darker and with indistinct cross 

 bands. Flaps purplish fleshy, with fine bluish marblings. One 

 flap runs from the gape below the tympanum to the neck. A 

 larger one runs the whole length of the body and nearly equals 

 it in breadth. The tail is fringed on either side by a scalloped 

 cnrtain with 15 to 20 rounded lobes. Grows to 7 inches, of 

 which the tail is nearly half. 



Inhabits Arrakan, Ramri, Pegu, Tenasserim, the Nikobar and 

 Andaman islands, the Malayan archipelego, &c. 



Cantor says the membranes act as a parachute when the 

 animal leaps, an observation probably suggested by a simulative 

 analogy with Draco, but strong confirmation is needed that the 

 animal ever so uses its flaps. Cantor made the same remark 

 with respect to the loose skin along the sides of Leiolepis, which 

 indubitably never attempts serial flights. 



