428 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Length to anus 48. 



Snout to orbit 5.5 



Snout to ear 12.4 



Orbit to ear 4.2 



Fore limb 16.3 



Hind limb 21.5 



Base of fifth to end of fourth toe 5.4 



Variation. — The number of postmentals in contact with the 

 mental is very constant. It is two in every specimen except 

 numbers 9800 and 11720 from Charles and 9412 from Hood 

 Islands. In these three specimens three postmentals touch the 

 mental, while in the other six hundred and sixty-eight exam- 

 ples the number is constantly two. 



There is considerable variation in the enlarged dorsal tuber- 

 cles. In fifty specimens from Charles, I count five rows in 

 thirty-one and six in nineteen. In forty-seven from Hood, the 

 counts are five rows in thirty, six in sixteen, and seven in one. 

 Of ten from Gardner-near-Hood, six have five rows and four 

 have six. In these one hundred and seven specimens, the only 

 ones examined in these respects, the dorsal tubercles are con- 

 tinued on the neck anterior to the fore limbs very slightly in 

 one from Charles, and nearly to the middle of the neck in five 

 from Hood, but not at all in any of the others. In a few 

 specimens from Charles and Hood the tubercles fail to reach as 

 far forward as the fore limbs, and in a few of the Charles 

 examples they are as little developed as in the one from Cham- 

 pion and two from Gardner-near-Charles, in which only the 

 upper row is continued forward much beyond midway between 

 the limbs. Occasionally tubercles are found in contact, or 

 separated by only one small granule; but in all specimens the 

 greater number of tubercles always are separated by from two 

 to four granules. 



I have been unable to find any sufficient basis for the separa- 

 tion of the geckos of Charles and of Hood islands. Perhaps, 

 on the whole, the enlarged dorsal tubercles are less strongly 

 keeled in Charles specimens than in those from Hood, but one 

 finds many Charles specimens with tubercles keeled as strongly 

 as in Hood Island examples. If there is an average difference 

 in this respect it is too intangible to use as a means of classifi- 

 cation. The only real difference which I have been able to 

 detect is in the presence of enlarged granules or tubercles on 

 the top of the head. In fifty-eight specimens from Hood and 



