NATURAL SCIENCES OF PHILADELPHIA. 103 



gitudinal series. Those on the occiput small, numerous, smaller than the 

 scales of the front and region of the canthus rostralis, which are swollen, and 

 as large as those of the abdomen. Gular scales minute. Syrnpbyseal acute- 

 angled posteriorly, bounded by the two oval, large mentals; each of these 

 bounded by three posteriorly. Five inferior labials opposite the middle ot 

 the orbit; first and second equal. Seven superior labials to the same point. 

 Internasals in contact. Preanals like abdominals. Transverse series of keeled 

 ovate tubercles on the tail, which are in contact or separated by one row of 

 scales. A row of broad plates beneath. 



Length from muzzle to angle of ramus mandibuli 1*4", to vent h". From 

 vent to end of tail 4". 



In spirits gray, with five blackish cross-bands, the median line pale, con- 

 tinuous. A narrow streak through loreal and temporal regions, a cross streak 

 on occiput, and a few longitudinal lines on the head. Tail with seven blackish 

 rings. 



Habitat. Cape St. Lucas, Lower California. Obtained by JohnXantus, Esq., 

 to whom it is dedicated. 



Pantodactylus bivittatus Cope, sp. nov. 



Internasal pentagonal, as broad as long. Anterior supraorbital largest, not 

 equal to the two others combined ; the latter are as large as the fronto- 

 parietals. Interoccipital larger than occipital, bounded behind by a small post- 

 interoccipital and two larger postoccipitals ; one or two large temporals. 

 Nasal subtriangular, nostril on the middle. Loreal much higher than long ; 

 6even superior labials, eye over fourth. Four narrow inferior labials. One 

 postsymphyseal, four infralabials, the two anterior pairs in contact. The 

 anterior pair of gulars in contact, the four succeeding separated by from one 

 to three plates, the following six in contact, transverse, the posterior form- 

 ing the edge of a collar. Four rows of abdominal plates, as broad as long, 

 two of ovate, smooth laterals, eighteen of elongate sharply-keeled dorsals. 

 The extended posterior extremity reaches the elbow of the appressed anterior. 

 Five femoral pores, four large anals, the posterior twice as long as the ante- 

 rior. Tail more than twice the length of the head and body. Total length 

 11-7'", tail 8-2. 



Above olive brown ; two yellowish brown bands from the temporal region, 

 bounded with darker above and below; in one specimen a median blackish 

 line. Below olivaceous yellow, olive spotted under the tail. 



Habitat. Paysondu, Uraguay, whence Mr. H. W. Kennedy has sent it to 

 the Smithsonian Institution, Washington. This species possesses a transparent 

 inferior palpebra like that of the con col or. (vid. Tschudi, " Die Familie 

 der Ecpleopoda "), while in the o rb i gny i it is squamous. 



Cnemidophorus hyperythrus Cope, sp. nov. 



External nares in the nasal plate. Brachium with four series of plates, 

 three on the antebrachium, the superior largest. Head rather narrow, 

 muzzle long. Hind foot two-fifths the length of the head and body. Three 

 rows of scales on the gular fold, the anterior row median, short, scales of the 

 posterior largest Posterior gular scales small, abruptly separated from the 

 anterior, which are large the median twice the size of those surrounding. 

 Supraocular plates four, rarely three. Abdominals in eight series some- 

 times additional small external plates. Frontoparietals united. Three larger 

 anals. 



From end of muzzle to collar, 1" 8"'; from collar to vent 4"; vent to end 

 of tail 14". 



Above brown or blackish ; two (?) yellow bands on each side, which extend 

 some distance on the tail, one from the superciliary margin, one from in- 

 ferior border of orbit; the last bordered with blackish beneath, and extend- 

 ing on the posterior extremity to the foot ; the caudal portion continued from a 



1863.] 



