LIOLAEMUS NITIDUS. 335 



head together, depressed at the base, subcorneal, and tapering poste- 

 riorly. Olive-brown above, with narrow, transverse, black bands ; 

 head varied with black. Beneath yellowish ; chin and throat irre- 

 gularly lineated with black ; belly and tail unicolor. 



Syn. — Tropidurus nitidus, Wiegm, in Nor. Act. nat. cur. XVII, i, 1835, 234, 

 Tab. xvii, fig. 2 (young). 



Liolaemus nitidus, Gravenh. in Nov. Act. nat. cur. XVIIt, ir, 1838, 727. PI. Liv, 

 figs. 8-10. 



Liolaemus lineatus, Gravenh. in Nov. Act. nat. cur. XVIII, II, 1838, 723. PI. 

 tiv, figs. 1-7.—? Gray, Catal. Lizz. Brit. Mus. 1845, 213. 



Descr. — The head is quite depressed, gradually declivous from the 

 occiput to the snout, otherwise, subpyramidal, rather obtuse anteriorly. 

 The neck is almost continuous with the posterior part of the head, being 

 but slightly contracted upon the gular region ; and, as to the body, it 

 is subcylindrical, rounded above, flattened beneath, diminishing some- 

 what posteriorly, being rather depressed upon the pelvic region, hence 

 passing gradually to the subconical and tapering tail, which is much 

 longer than the other regions of the animal taken together. The 

 limbs are moderate in length : the anterior ones are slender, not 

 extending to the groins, when stretched in that direction ; the poste- 

 rior ones are stouter, and, when extended forwards, the tip of the 

 longest toe may approximate the auricular aperture. 



The cephalic plates are well developed, and arranged with great 

 regularity and symmetrical beauty upon the specimen now before us. 

 We first observe an anterior pair of transversely elongated and exigu- 

 ous internasals, contiguous upon the middle line of the snout, and 

 laterally each to the nasal plate ; then, a posterior pair, subpenta- 

 gonal, longitudinally, and somewhat obliquely situated upon the 

 middle of the internasal region, contiguous anteriorly to the pair just 

 alluded to. Five fronto-nasals come next, placed upon a crescent- 

 shaped figure ; a middle one, hexagonal and elongated, is situated 

 immediately behind the commissure of the posterior pair of inter- 

 nasals, and between which its anterior angle somewhat engages, whikt 

 its posterior angle is slightly engaged between the commissure of the 

 prefrontals ; the adjoining two, subpentagonal in shape, are placed 

 one on each side of the middle one, with their longest diameter 

 directed obliquely outwards ; the remaining two are elongated, exigu- 

 ous, posteriorly acute, situated between the outer angle of the prefron- 



