CROCODIIJANS, LIZARDS, AND SNAKES. 



527 



touasiil moderate, rhomboid encircled by the post-interuasals and pre- 

 frontals, the latter larger than former. Only two postnasals. Supra- 

 orbitals five and three. Dorsal scales all strongly carinated (rather 

 less on the sides), even on the neck. Sides of tail and upper edges of 

 limbs weakly keeled. 



vVbove, greenish ash. Sides with twelve vertical black bars distinctly 

 margined behind by white. Six median dorsal rows, with a central 

 row of small dark spots; seldom obscuring the transverse bands, and 

 without white spots. 



The head is short and broad; the width three-fourths the distance 

 from snout to ear, which is one-fifth the head and body. There are 

 forty-seven scales from head to above anus; rather more slightly cari- 

 nated on the sides than above. There are fourteen dorsal rows of 



Fig. 94. 



GERRHONOTL'S BUKNETTII (tR.4Y. 



California. 



Cat. No. J13I, U.S.N. M. 



scales, but a fifteenth is seen at intervals along the doi-sal line, and 

 there should really be a sixteenth. The cheek scales are smooth, those 

 on the upper edge of the legs taintly carinated. The surface of the 

 head is slightly arched or convex; the plates not very smooth. The 

 four internasals are large, in two rows, which are as long as broad. 

 The frontal is very small, rhomboidal; completely embraced between 

 the postfrontals behind and the posterior row of internasals before, 

 which are in contact, a very peculiar feature. There are but two 

 postnasals and a large loreal. The hinder feet from knee are equal 

 to distance from snout to ear; the forefeet from elbow are a little 

 less. 



The ground color is a light greenish gray or ash, with a series of 

 about twelve vertical black bars, spotted with white, on each side, 

 the bar the width of a single scale, but sometimes passing from one to 

 another. A dorsal span of about six scales in width is without bars, 

 but with a series of thirteen or fourteen subquadrate dark blotches, not 



