188 LIZARDS OF THE 



One young specimen, measuring 45 mm. from snout to 

 vent, collected by Dr. Nieuwenhuis on the Upper Mahakam. 



Our specimen differs in coloration from Boulenger's 

 description in having one median dorsal series of lighter 

 dark-edged spots, flanked on each side with a series of 

 smaller spots. These three series, the median and the two 

 lateral ones, continuing on the tail. 



Tail shorter than the body, vertically oval, broader in 

 the middle than at the root, ending in a white coloured tip. 



4. Hemidactylus frenatus D. & B. 

 Several specimens from Sintang. 



5. Hemidactylus nigriventris, nov. spec. 



Allied to H. frenatus, but differing from this species in 

 the lepidosis of the tail and the presence of a fold along 

 the sides of the belly. 



Fingers free, moderately dilated, inner with sessile claw. 

 Upper surfaces covered with small granules, largest on the 

 snout; on the back these granules are intermixed with 

 some irregularly scattered, small, round, convex tubercles 

 always very much smaller than the ear-opening. 



A distinct fold from axilla to groin. 



Tail round, but slightly depressed at the base, and not 

 depressed at all further backwards, tapering, covered above 

 with very small smooth scales without enlarged or spinose 

 tubercles, below with a mediau series of transversely 

 dilated plates. 



Rostral four-sided, nearly twice as broad as deep, with 

 median cleft above; nostril pierced between the rostral 

 and four nasals, the first labial being separated from the 

 nostril by the first of these four nasals. 



Ten upper- and twelve lower labials. 



Mental large, triangular, two pairs of chin-shields, the 

 first in contact behind the mental. 



Grey above, underpart of head and gular region whitish, 

 underparts of belly and limbs darker, middle of the belly 

 and underpart of feet black, underpart of tail black, except 

 14 or 15 plates in the middle of the tail which are whitish. 



Notes from tlie Leyden Museum, Vol. XXV. 



