Vol.1] VAN DENBURGH— GECKOS OF GALAPAGOS ARCHIPELAGO /\\o 



Length to anus 61. 



Snout to orbit 7.5 



Snout to ear 15. 



Orbit to ear 5. 



Fore limb 21. 



Hind limb 27. 



Base of fifth to end of fourth toe 8. 



Variation. — All the specimens agree in the distribution of 

 the enlarged tubercles. These usually are in about seven rows 

 on each side near the middle of the body; but the rows are 

 somewhat irregular, and one sometimes counts six or eight. 

 The postmentals in contact with the mental are two in all of 

 our twenty-one specimens. All have the broad subcaudal 

 series well-developed. 



Young average darker than the adults, and have darker 

 markings. The general pattern is similar in all, but, of course, 

 is subject to more or less variation. Some specimens are more 

 evidently cross-barred, while some are clearly reticulated. 



The largest specimen measures 71 mm. from snout to anus. 



Coloration in life. — "P. tuherculosus is more brightly col- 

 ored than P. leei, having black blotches down the back. These 

 blotches are seven or eight in number, and almost form bands. 

 The large tubercles are very prominent, like little white spots ; 

 while the rest of the body is liver-colored, white underneath" 

 (Slevin). 



General remarks. — This gecko has been taken only on 

 Chatham Island and has no very close relatives elsewhere in 

 the Galapagos. It is widely distributed in continental America, 

 and it seems probable that it has but recently been introduced 

 into the Galapagos. Unfortunately I have no specimens from 

 the mainland with which to compare those from Chatham. It 

 is possible that minor differences may exist, although the series 

 from this island agrees very well with descriptions of conti- 

 nental specimens. 



Phyllodactylus gilberti Heller. Wenman Island Gecko. 



Phyllodactylus gilberti, Heller, Proc. Washington Acad. Sci., V, 1903, 

 p. 61 (type locality Wenman Island), Galapagos Archipelago). 



Diagnosis. — Limbs without enlarged tubercles; back with 

 rows of enlarged tubercles, not very distinct except posteriorly ; 



