REPTILES 



75 



ter spotted with black posteriorly ; throat black ; breast and fore limbs 

 proximally dark slaty-spotted with black; belly grayish plumbeous. 



Length of head and body 105 mm. Scales in circumference of 

 body 60. 



An adult female, Cat. No. 3985, Stan. Univ. Mus., which exhibits the 

 typical coloration is uniform dark brownish-olive above, considerably 

 darker than in the male ; sides of head and body similar. Below dark 

 plumbeous, darkest on throat where nearly black ; breast and mandible 

 spotted with black ; the chin grayish-green. 



Much variation occurs in the sixty specimens secured from various 

 parts of Narboro. The typical form occurs all along the barren lava 

 fields bordering the coast where they feed on the littoral Crustacea. 

 Farther inland where the lava is overgrown with vegetation they be- 

 come smaller and lighter colored, resembling specimens secured on 

 Albemarle in similar situations. 



The food of the smaller inland form consists of insects, and the seed 

 capsules and ovaries of various flowers. 



Tropidurus grayi magnus. 



TROPIDURUS GRAYI BARRINGTONENSIS (Baur). 

 Tropidurus barringtonensis BAUR, Festchr. Leuckart, p. 267, 1892. 



Range. Galapagos Archipelago ; Barrington Island (Baur, Hop- 

 kins Stanford Expedition). 



Subspecific Characters. Scales in circumference of body, 6573 ; 

 female dark-barred above ; male light grayish above with dark bars, 

 the breast and lower jaw reddish ; length of head and body in male 

 91100 mm., in female 66-76 mm. 



Coloration in life of an adult male, Cat. No. 3934, Stan. Univ. 

 Mus. Above light grayish-brown, tail darker grayish ; whole upper 

 surface except head spotted with blue-gray ; the dorsum anteriorly and 

 fore limbs black barred and spotted ; hind limbs and tail without dark 

 bars. Head above olive green, grayish on sides and neck, black- 

 spotted. A black antehumeral spot. Sides of body behind axilla 



