NYCTERIDIUM SCHNEIDERI. Ill 



about forty longitudinal series. Tail rather depressed, with a sharpish, non-serrated lateral 

 edge, entirely granular, without enlarged subcaudals*. Pupil elliptical, erect. 

 Twelve upper and eight lower labial shields; the chin behind the front labial is 

 covered with numerous, subequal, very small shields. The lamelltB of the thumb 

 are angularly bent, but not divided into two. Cutaneous fold in the ham rudi- 

 mentary. Uniform brownish olive. 



The single specimen observed is in the British Museum, which received it from Pinang 

 through Dr. Cantor, who named it Hemidactylus peronii, D. <&■ B. It is 3 inches long. 



NYCTERIDIUM. 



Fingers and toes dilated, ovate, with two series of transverse, imbricate 

 plates beneath ; thumb and inner toe with a compressed ungual phalanx 

 and with a claw. Sides of the trunk with a cutaneous expansion. Tail 

 flattened, serrated on the sides. 



This genus is identical with Plafi/urus, Gray, a name preoccupied for a genus of Sea 

 Snakes. It is a modified form of Hemidactylus, to which it stands in the same relation as 

 Ptychozoon to Gecko. Only one species is known. 



NyCTEEIDIUM SCHNEIDERI. 



Stellio platyurus, Schneid. Denkschr. Acad. Wiss. Munch. 1811, tab. 1. fig. 3. 



Lacerta sclmeideriana, Shaw, Zool. iii. p. 278. 



Hemidactylus platyiirus, Wiegm. Act. Ac. Leop. Carol. Nat. Cur. xvii. p. 288. 



marginatus, Wiegrn. Amph. p. 145. Dum. ^- Blbr. iii. p. 370. pi. 30. fig. 2 (not good). 



Platyurus schneiderianus, Gray, Lizards, p. 157. 



Back uniform granular, without any tubercles. Scales of the middle of the belly in 

 thirty-eight or forty-two longitudinal series. Tail strongly depressed, with compressed and 

 finely serrated lateral edges, uniform granular above, scaly beneath, with a series of enlarged 

 subcaudals along the middle. Nine or ten upper and as many lower labials ; two pairs of 

 mental shields. The hind limb with a broad cutaneous fringe behind. Olive-coloured 

 above, uniform or marbled with darker ; an irregular brownish baud runs through the eye 

 along the side of the body. 



This species is found throughout the East Indian Ai-chipelago, in Assam and Bengal ; it 

 is common in Siam and at Pinang. Kelaart has sent two specimens from Ceylon. It 

 attains to a length of i\ inches. 



* In the single specimen observed the tail had been broken off and is reproduced. 



