14() ALBATROSS EXPLORATIONS, REPTILES COPE. 



laterals in vertical rows. Fifty rows of ventral scales between lines of 

 axilla and groin. Dorsal crest low, becoming more elevated on tbe 

 proximal caudal region. Toes of extended bind leg reacbing to orbit. 

 A strong fold bordered with a few large scales in front of tbe humerus 

 and an open pocket in front of it lined with granular scales. Auricular 

 meatus three-quarters the length of the eye, bordered in front by a few 

 acuminate scales. Frontal scales divided longitudinally. Scales of 

 top of muzzle more divided than in T. grayi, the six large scales of the 

 latter represented by nine or ten. One row of large and two or three 

 rows of small superciliary scales. Nostril subvertical in direction. 



Color dark olive with a light greenish or brownish gray baud extend- 

 ing from the orbit to the base of tbe tail. The dark olive of the back 

 is dark bordered ; the light band is more or less brown speckled, and the 

 dark of the sides is more or less light cross-barred, and it is frequently 

 bounded below by a secoud light longitudinal band. Integument 

 within prehumeral fold black. Top of head and limbs nearly uniform 

 browu ; lower surfaces light yellowish. 



The females are smaller than the males, and like those of the other 

 Galapagos species differently colored. The longitudinal bands are 

 wanting; the sides are vermilion red, and there is a red half-collar on 

 the inferior half of the neck. 



As compared with the T. grayi, its nearest relative, this species 

 differs in the large size of the lateral scales, in the subdivision of the 

 scales of the muzzle, and in the coloration. The dorsal crest is lower. 

 The females differ in the distributiou of the red. In T. grayi the sides 

 of the head are red in the female, and in the T. pacificus the entire top 

 of the head is rusty red. 



It is worthy of notice that in this genus, differently from Sceloporns, 

 it is the females that possess the bright colors instead of the males, and 

 that red takes the place of blue on the throat a id sides of the belly. 



Measurements of 3 • 3f m 



Total length 190 



Length to vent - 70 



Length to axilla 30 



Length to can thus oris 14 



Width at canthns oris 14 



Length of fore limb 30 



Length of fore foot 14 



Length of hind leg 51 



Length of hind foot 25 



Measurements of 9 • 



Total length 153 



Length to vent 58 



Length to axilla 21 



Length to canthns oris 10 



Width at canthus oris 11 



From Chatham Island, Nos. 14945 to 149G4. 



