Vol. II, Pt. I] VAN DENBURGH—SLEVIN—GALAPAGOAN LIZARDS 191 



Diagnosis. — Rostral not less than twice as broad as high; 

 dorsal crest higher than in C. subcristatus; snout more pointed ; 

 coloration above clay yellow. 



Type.— Adult female, Stanford University No. 4749. Bar- 

 rington Island, Galapagos Archipelago, May 1899. 



Distribution. — Barrington Island. 



Material. — The Academy collection includes twenty-five 

 adult specimens in alcohol, and some skins and bones. 



Variation. — The supralabials range from 9 to 11, the usual 

 number being eleven. The femoral pores vary from 19 to 25, 

 the most frequent numbers being 21 and 22. The rostral is 

 not less than twice as broad as high in any specimen. The 

 coloration is constantly of the light yellowish type. 



Field Notes.— Oct. 20, 1905.— Anchored on N. E. coast 

 of Barrington, and went ashore and a mile inland to 

 the iguana colony on a plateau at an elevation of 

 about three hundred feet. The ground is composed of soft 

 red volcanic dust which is easily dug by the iguanas. The 

 burrows resemble those of a ground-squirrel only larger. We 

 found the iguanas common here. As a rule they were sitting 

 at the mouths of their burrows, and would run in on near 

 approach. They were awkward in their movements but cov- 

 ered ground at good speed. They lose their heads when 

 chased by several persons, and don't make for their burrows, 

 but run around and get caught in the brush, where they are 

 easily captured by their tails. They are very vicious, seizing 

 one another by the jaws and drawing blood. One we caught 

 tore the whole lower jaw off another. They are bright buff 

 to orange in coloration, the eyes being bright red with round 

 black pupil. 



Oct. 23, 1905. Found three or four females containing 

 large eggs. The stomachs contained cactus, which grows 

 abundantly all over the island. 



Oct. 24, 1905. Found the males rare, not living in the 

 colony, but outside in the lava piles. I think I have three 

 males altogether. 



July 9, 1906. We found that some of the natives had vis- 

 ited the island and cleaned out the entire iguana colony where 

 we secured our specimens on our first visit. However, we saw 

 a few iguanas scattered about. 



