CROCODILIAXS, LIZARDS, AND SNAKES. 



.17 



opMunis Cope is from the State of Vera Cruz, from wliicb regiou, as well 

 as from Puebla, Oaxaca. aud Guanajuato, the typical G. I. Uocephalus 

 has been sent. 



GERRHONOTUS LIOCEPHALUS INFERNALIS Baird. 



(ierrhonotrs UocephaltiK infernaUs Baird, Proc. Acad. Nat. Sei. Pbila., 1858, p. 255. 



Body rather slender, very small, considerably depressed. Tail twice 

 the head and body. Hind leg from knee equal to the head to ear. 

 Dorsal scales in sixteen longitudinal and fifty-one oblique series; sixty- 

 seven from chin to anus; tail with 127 whorls. Eight central or median 

 dorsal rows of scales ob- 

 tusely and faintly cari- 

 nated (very obsoletely on 

 the outer rows); central 

 two or three rows on the 

 tail similar; all the other 

 scales perfectly smooth. 

 Xasal plate applied only 

 against the second labial 

 and separated from the 

 rostral. Three supple- 

 mentary plates between 

 rostral and internasal; 

 the frontal hexagonal en- 

 circled by six plates. 

 Four postnasal, the up 

 per posterior very large 

 and superior. Four lore- 

 als instead of one. 



Above light olive, with 

 seven or eight obscure 

 bars of darker, bordered 

 before or behind with 

 bars of the ground color, 

 edged faintly with whit- 

 ish. Beneath yellowish, 

 marbled coarsely with 

 olive. Head plain. Tail nearly uniform reddish olive. 



The single specimen of this subspecies exhibits peculiarities of cephalic 

 plates which, if constant, will at once separate it from all other known 

 North American Gerrhonoti. The head is depressed, running forward to 

 an acute point; pyramidal; the length two-thirds the width, which is 

 five-sevenths the length to ear, which in turn is rather more than one- 

 fifth (about two-ninths) the head and body. The moutli is unusually 

 pointed aud depressed. The dilference in the cephalic plates from those 



Fig. 91. 



GERRHONOTUS LIOCEPHALUS INFEKNALIS BAIUD. 

 =1. 



Texas. 



Cat. No. 136S6, U.S.N.M. 



