V„.. 1, VAU nENBURGH-GECKOS OF GALAPAGOS ARCH.FELAGO 429 



Gardner-near-Hood the granules on the posterior Part of the 

 upper surface of the head are quite un.fortn in all but four 

 In these four exceptions a very few granules are somewhat 

 enlarged In fifty geckos from Charles Island, on the other 

 hand only ten have no enlarged granules in th.s reg.on wh.le 

 thTrtone have a few, and nine a moderate number of enlarged 

 granules. Here, again, the difference is not great enough to 

 justify the separation of the geckos of these two islands 



There is so much variation in color that nothing of value 

 can be said concerning it. Specimens may be either dark or 

 light, heavily blotched or nearly unicolor. 



Habits.— Ur. Slevin's field notes are as follows : 

 "Charles Oct 4, 1905.— Collected the geckos on a small 

 mountain about two miles inland. Found them all under lava 

 blocks. Oct. 6.-Caught several geckos under lava blocks^ 

 We found them quite plentiful, but the elevated land is .he 

 best olace to get them. They have eggs in them at this date, 

 and a great many broken shells can be found under the lava 

 blocks Oct 7.-Went ashore at Black Beach. Saw no rep- 

 tiles exceot geckos. These were common, especially near the 

 btch but frew scarce at 1000 feet elevation. They were 

 :*d under'loose lava blocks and dried wood^ A so go tse^ 

 eral eggs, in some of which I found geckos. Oct. 9.-I found 

 no gefo over 1000 feet elevation. They were all taken on the 

 slope facing Black Beach. When captured they make a slight 

 snneakinsr sound, somewhat like a mouse. Oct. U.— coi- 

 S onVhund;ed and twenty-five geckos along the slope 

 under old wood and lava blocks. March 2, 1906.-I found 

 the geckos very common under stones or rather large pieces of 

 ava They seem at this time to be lower down m the dry belt. 

 I found them rare at 200 feet. Higher up the ground now is 

 moist under the rocks ; so, as they seem to prefer a dry country 

 they apparently have moved down toward the beach. found 

 some of the females with eggs well enlarged. May 23, 1906--- 

 Found geckos abundant under the loose lava blocks near Black 

 Beach Collected sixty-nine during the afternoon. 



"Champion, near Charles. Oct. 3, I905.--Covered the 

 island in an hour and a half. I saw two geckos under lava 

 blocks and caught one. 



