266 S A U R I A. 



inclosing posteriorly the middle occipital, and contiguous anteriorly to 

 the parietal, the fourth supraocular, and the two upper postorbitals ; 

 laterally to the upper temporal shield, and posteriorly to the post- 

 occipitals, of which there is a contiguous pair, moderately developed, 

 meeting anteriorly the upper temporal shield. There are four well- 

 developed and subequal supraocular plates, differing in shape, though 

 subequal as regards the area which they cover. The anterior supra- 

 ciliary might occasionally be taken for a fifth small supraocular : then 

 the supraciliaries would number six only, all of which rather small ; 

 the posterior one being much more elongated than the middle ones, 

 since it extends along the whole margin of the last supraocular. The 

 postnasal (anterior loral) is elongated, subtrapezoid, narrowest poste- 

 riorly, contiguous above to the prefrontal and postfrontal, arid beneath 

 to the second labial. The loral is likewise subtrapezoid, narrowest 

 anteriorly, where it meets the postnasal, and, as a whole, somewhat 

 more developed than the latter; it is contiguous above to the post- 

 frontal and anterior supraocular, and resting upon the third labial. 

 There are three anteorbitals; the lower one being the smallest and 

 triangular, resting upon the fifth labial ; the upper one acutely trian- 

 gular, but slightly larger, and situated under the first supraocular, 

 whilst the middle one is subquadrangular and well developed, though 

 a small portion only enters into the orbit, resting, as it does, upon 

 the fourth labial, and thus occupying a portion of the loral region. 

 We observe no supralabial plates : the sixth and seventh upper labials 

 constituting the inferior rim of the orbit. There are five or six 

 very small postorbitals, irregularly disposed upon a series, and two 

 somewhat larger, immediately behind the former, and, as already 

 observed, contiguous to the latero-occipital plate. The surface of the 

 eyelid is granular, and the ciliary edge provided with numerous 

 small plates. The transparent disk of the lower eyelid is subcentral 

 and elliptical. Five or six temporal shields may be distinguished 

 from the adjoining scales : an upper, elongated one, contiguous to 

 the latero-occipital. The auricular aperture is moderate, subcircular, 

 provided anteriorly with one well-developed, and two small, erect 

 scales. The tympanum is deeply seated. The upper labials are 

 eight in number ; the two anterior rather narrow and elongated ; the 

 three following ones, subquadrangular, increasing gradually in size to 

 the sixth, which is the largest, and longer than deep ; the seventh 

 and eighth are the next in size, and nearly as deep as long. The 



