132 LIZARDS OF THE PHILIPPINE ISLANDS 



brown ; brown lines radiating from eye ; tympanum light, below 

 dirty brownish yellow, with indications of darker spots or re- 

 ticulations. 



Measurements of Gonyocephalus semperi (Peters). 



mm. 



Total length 228 



Snout to vent 88 



Tail (tip missing) 140 



Snout to foreleg 36 



Axilla to groin , 41 



j Width of head 19 



Length of head 29 



Foreleg 51 



Hind leg 83 



Yanation. — There are five other specimens in my collection 

 from Bunawan, Agusan, and two from Mindoro. Of the Min- 

 doro specimens one was collected by myself at San Teodoro, on 

 the northern coast; the second was collected by Mr. Clark Burks 

 at Sumagui, Mindoro. The Bunawan specimens are females and, 

 with a single exception, all have very distinct lines of enlarged 

 scales, one on either side of dorsal crest ; on the largest specimen 

 (100 millimeters from snout to vent) , the rows of enlarged scales 

 are dim or wanting on the anterior part; a small knob on the 

 posterior part of orbit is prominent, and the two bony spines 

 in occipital region are more prominent. One specimen has the 

 rostral broken into three equal parts; the upper and lower 

 labials vary between ten and thirteen. The hind legs in the 

 different specimens always reach beyond the eye, but only in 

 the one described does it reach the tip of the snout. Much of 

 the coloring is lost after they are preserved, but the black nuchal 

 collar followed by a light yellowish brown stripe is usually prom- 

 inent; the brown transverse bars on legs, tail, and digits are 

 usually discernible. The two specimens from Mindoro have the 

 nasal in contact with the first labial and separated from the 

 rostral by a single scale; the median scales on the snout are 

 larger and arranged in a Y-shaped formation. The markings 

 are similar to those of the Mindanao specimens. 



Remarks. — No male of this species is at hand for study. Ap- 

 parently the species does not differ greatly from G. interruptus 

 Boulenger. The type specimen was collected by Semper in the 

 Philippines in 1858-1866 ; the exact locality is no longer known. 

 Known from Mindanao and Mindoro. 



