518 REPORT OF NATIONAL MUSEUM, 1898. 



of G. multicarinatus appear to be caused by the development of three 

 additional plates just back of the rostral, aud the unusual size and more 

 superior position of the upper posterior postnasal. The three supple- 

 mentary rostral plates are all in contact anteriorly with the rostral; the 

 median largest, separating the anterior pair of internasals, and in con- 

 tact behind with the two posterior internasals which are in apposition. 

 The lateral supplementary plate separates the nasal entirely from con- 

 tact with the rostral and the first labial, the nasal being restricted to the 

 second labial. The posterior pair of internasals is large; longer than 

 broad; bounded externally by the displaced anterior iuteruasal and the 

 upper first postnasal. The upper second postnasal is very large and on 

 the canthus rostralis; almost entirely on the upper surface of the head. 

 The frontal is hexagonal and encircled by six plates, in front by the pos- 

 terior internasals, laterally by the upper posterior postnasal (as large as 

 the lower), and behind by the j)Ostfrontals; of these the latter are 

 rather largest, the others nearly equal. The usually single loreal is 

 replaced by four small plates, the anterior upper largest; the posterior 

 upper smallest; the two lower square, equals and forming a kind of bor- 

 der to the upper labials. There are nine labials to the i)osterior infra- 

 orbital, instead of eight. The supraorbital plates are five and three. 



The general color above is a dull, light greenish or true olive, with 

 about seven obscure bands across the back and sides between head 

 and tail, covering a width of some two scales. On the sides some of 

 the scales adjacent to these dusky bars (not always the posterior ones) 

 are edged with dull clayey whitish. The tail is scarcely varied anteri- 

 orly, only there are some traces of the whitish edges. The under parts 

 are light yellowish, obscurely marbled with the ground color of the 

 back. The head is entirely uniform olive, exce])t below. 



The lateral blotches are somewhat peculiarly constituted. The pat- 

 tern is as if there were one vertical row of scales of a plain dark brown, 

 and another behind this of the lighter ground color edged with whitish, 

 the two then broken midway and the lower half transposed, so that on 

 one row the lower scales are whitish, the upper brown; while in that 

 posterior to it the lower are brown, the upper whitish; the succession 

 below being thus white and brown, and above brown and white. The 

 perfectly plain intervals cover about four rows. 



This lizard occurs throughout the first plateau country of Texas from 

 the Kio Grande to the Red River. It has been found on the Helotes 

 Creek by Mr. Marnock, aud in Wichita County by Mr. Boll. I did not 

 see it living; it is rather rare, and is said to inhabit rocky places. 

 There is no evidence of its occurrence outside of Texas in the United 

 States. It is not known to occur within the proper limits of the 

 Sonoran subregion, but is common in the Tampican subregion of the 

 Centra] American region of the neotropical realm. It must be regarded 

 as an invader from that realm, but it ranges much farther north than 

 any of the other forms of that launa. 



