PROCTOTRETITS SPLENDIDUS. 329 



Subgenus PROCTOTRETUS (Dum. & Bibr.), Grd. 



Gen. Char. — Cephalic plates small, subequal, imbricated, and cari- 

 nated ; one or two series of supralabials. Nostrils lateral, in a line 

 with the supraciliary crest. Temporal scales moderate, carinated, 

 not acuminated. Auricular aperture small or moderate, denticu- 

 lated in front. Sides of neck with a slight longitudinal fold, and 

 a vertico-oblique one in advance of the shoulder, covered with 

 scales similar to those of the back. Dorsal and lateral scales large, 

 subequal, subrhomboid, or sublanceolated, conspicuously carinated, 

 and acuminated. Abdominal scales sublanceolated, and bifid pos- 

 teriorly. Posterior aspect of thighs minutely scaly. Colors : lon- 

 gitudinally light-streaked, with intervening series of dark spots. 



Observ. — The small, imbricated, and keeled cephalic plates, will 

 easily distinguish this group from its natural allies. Even the abdo- 

 minal scales seem to be more deeply emarginated than in the follow- 

 ing subgeneric groups. 



According to Fitzinger, Liolaemvs marmoratiis, of Gravenhorst 

 (Nov. Act. Acad. nat. cur. XVIII, ii, 1838, 728, PL lit, fig. 11), would 

 belong to this genus. 



1. PrOCTOTRETUS SPLENDIDUS, Grd. 



(Plate XVII, figs. 1-7.) 



Char. spec. — Scutis labialibus exiguis, elongatis, et paulo majoribua 

 quam suprdlabiales, qui in seriem duj^Ucem disponuntur. Squamis 

 temporalibics imbricatis. Apertura auditoria parva. TJnica serie 

 scutorum infralahialium, exiguiorum quam labiales inferiores. Scu- 

 torum mentalium trihus paribus. Cristis pectinatis tribu^, una se- 

 cundum dorsalem regionem medianam et una iii utroque tergi latere. 

 Supra smaragdino-viridi, cum quinque seriebus macidarum subova- 

 tarum, fuscchcastanearum, et nigro marginatarum. Cristis pectinatis 

 lateralibus aureis. Fade capitis siiperiori transverse aureo lineata, 

 Lateribus corporis et cruribus fulvo-flavis, fusco variegatis. Infra 

 albescente. 



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