18 ox THE ZOOLOGICAL POSITION OF TEXAS. 



Indianola. I ag-ree with Messrs. Uensliaw and YarroTV that the P. 

 pUv.iiccps^ Hallow., is not distinct. 



Gerrlionotus infcrnalis Baird. This lizard occurs throughout the first 

 plateau country, from the Eio Grande to the Eed Eiver. It has been 

 found on the Helotes Creek by Mr. Marnock, and in Wichita County by 

 3Ir. Boll. I did not see it living; it is rather rare, and is said to inhabit 

 rocky places. 



Oplieosaurus ventralis Linn. I did not observe this species in South- 

 western Texas, but obtained it from near Dallas. The specimens are of 

 the western variety, with only fourteen rows of dorsal scuta, or the sub- 

 si^ecies attenuatus of Baird. A specimen from the same locality is simi- 

 lar in the characters named, but is remarkable for the strong carination 

 of its suj)erior scales. The carina3 are elevated on the ten median rows, 

 so as to leave sulci between them. On the posterior i)art of the body 

 the keels extend to the lateral rows, and on the tail even to the inferior 

 surface. There are only ten superior labial scuta, and no postparietals. 

 The infracanthal row extends over the eye, giving three rows between the 

 latter an^ the frontal plate. I am not sure that these characters are 

 constant, so I note this form under the varietal name of sulcatus. It is 

 described from a half-grown animal. 



Gnemidopliorus scxUneatus Linn. The "swift" is common in Texas. 

 To t!ie northwest I saw it as far as the upper waters of the Guadalupe, 

 and it is common at Fort Concho, and east to Dallas and Fort Worth. 

 It doubtless extends farther in this direction. It is entirely terrestrial 

 in its habits, and moves with greater rapidity than any other lizard. 



Eumeces fasciatus Linn. Professor Baird has shown that the Seincus 

 erythroceplialus^ quinqueUneaUis, und fa sciatus are forms of the same spe- 

 cies ; the first name having been given to old males. It is common near 

 Dallas and eastward, but I do not know it from Western Texas. 



Einneces ohsoletus Bd., Grd. Mr. Marnock obtained this species near 

 Ilelotes, where it is rare. I saw, but did not succeed in capturing a 

 lizard, which I sui)pose to belong to this species, near the head waters 

 of the Medina Eiver. It was of dark tints, with light spots on the 

 sides of the head, like the younger stages described by Professor Baird. 

 It was concealed beneath the bark of a log, and evading for a consider- 

 able time my attempts to take it, finally escaped. 



Eumeces breviUneatus sp. nov. ^sTo postnasal plate ; anterior loreal not 

 elevated, reaching interfrontonasal, its posterior border striking the 

 middle of the second labial ; second loreal longer than high; two pre- 

 oculars, between fonrth and fifth superior labials. One large pentago- 



