140 LIZARDS OF THE PHILIPPINE ISLANDS 



posterior part of occiput; dorsal crest very low, but distinctly 

 separated from nuchal crest ; scales on body strongly keeled ; the 

 keels on the eight upper rows form broken lines pointing up- 

 ward and backward; scales in sixty-eight rows around body; 

 scales on belly largest ; a more or less distinct depression on neck 

 behind tympanum; foreleg brought back reaches to groin; the 

 adpressed foreleg reaches to nostril; body and base of tail 

 broadly triangular in cross section. 



Color in life. — Bright yellow-green above, darker green on 

 head and neck; the body crossed by nine or ten dim whitish 

 bars made up of more or less rounded spots, each alternate 

 bar more distinct; belly and underside of chin and throat 

 greenish yellow or greenish white ; tail dimly barred with darker 

 at base; end of tail gray. 



Measurements of Calotes cHstatellus (Kuhl) . 



mm. 



Total length 425 



Snout to vent 104 



Tail 321 



Length of head 30 



Foreleg 55 



Hind leg 90 



Variation. — The size of the lateral scales varies considerably. 

 Boulenger gives the range of scale rows as fifty-seven to ninety- 

 seven. The arrangement and disposition of the nuchal and dor- 

 sal scales vary considerably. Certain Palawan specimens have 

 a much higher nuchal crest than the one described, and the dor- 

 sal crest is likewise higher. There is a distinct break between 

 the two crests. 



Several specimens in my own collection from Mindanao have 

 the spines forming the nuchal crests strongly overlapping at 

 the base and curving strongly backward, not making a serrated 

 crest. 



Remarks. — With larger collections it will doubtless be possible 

 to separate out more than one form worthy of subspecific rank. 

 I do not regard my treatment here as wholly satisfactory. In 

 the Philippines this form is found in Palawan, Calamianes, Ca- 

 gayan Sulu, Mindanao, and the Sulu Archipelago. Boulenger 

 lists a specimen from Dinagat. 



Genus HYDROSAURUS Kaup 



Hydrosanrus Kaup, Isis (1828) 1147. 



Lophura Gray, Phil. Mag. 2 (1827) 36;, Wagler, Syst. Amph. (1830) 



