THE REPTILES OF THE GALAPAGOS ISLANDS. 83 



neck brings this species close to P. JReissn, described by 

 Peters from Guayaquil ; the latter is readily distinguished 

 by its mental shield which is almost entirely between the 

 first pair of infralabials, and these are hardly smaller than 

 the mental itself. 



Uab. Las Cuevas, Charles Island, 

 Phyllodagtylus Leei Cope. 



On one individual there are six labials in front of a ver- 

 tical through the pupil on one side and seven on the other. 



Uab. Chatham Island. 



GONATODES COLLARIS Sp. U. 



Head moderate ; snout obtusely pointed, longer than 

 the distance between the eye and the ear opening, one and 

 one-half times the diameter of the orbit, equal the width of 

 the crown at the hinder edge of the orbit ; forehead flat ; 

 ear opening small. Digits slender ; basal joint slender, 

 sul)cylindrical, with larger plates beneath ; other joints 

 more slender, compressed. Head, throat, upper portions 

 of body, limbs and tail covered with subequal granular 

 scales, smallest on the occiput, larger on chin and tail. 

 Rostral broader than high, pentagonal, incised on the top. 

 A small internasal toward each side. Two small shields 

 behind the nostril. Six labials ; sixth small, slightly behind 

 the middle of the eye. Five infralabials ; posterior nearly 

 reaching a vertical from the hinder border of the eye ; first 

 large, in contact with two submentals ; mental large, with 

 a median and two lateral angles posteriorly, in contact 

 with a pair of moderate submentals, at each side of which 

 there is one scarcely half as large, from Avhich again a 

 diminishing series of three or four passes back along the 

 infralabials. Abdominal scales moderate, imbricate, hep- 

 tagonal, flat, similar to scales in front of thighs and arms. 



