214 SAURIA. 



Fig. 8, abdominal shields, from the middle region of the abdomen. 

 Figs. 5-8, are drawn about twice the size of life. 



4. ELGARIA PRINCIPIS, B. & G. 

 (Plate XXII, figs. 9-16.) 



CHAR. SPEC. Squamis dorsualibus in octo et quadraginta series transver- 

 sales et quatuordecim longitudinales dispositis. Scutis postnasallbus 

 tribus, inaequalibus. Scutellis praeanalibus qiiam abdominal ibus ma- 

 joribus. Oauda corporis et capitis longitudinem aliqaanto excedente. 

 Supra fusco-olivacea, maculis nigrescentibus in series longitudinaUs 

 ordinatis ; infra unicolori. 



SPEC. CHAR. Dorsal scales disposed upon forty-eight transverse and 

 fourteen longitudinal series. Three unequal postnasals. Preanal 

 shields larger than the abdominal ones. Tail longer than the body 

 and head together. Above olivaceous-brown, with blackish spots 

 disposed upon irregular longitudinal series. Beneath unicolor. 



Svx.Elgaria principis, B. & G. in Proc. Acad. Nat. Sci. Philad. VI, 1852, 175. 



DESCR. The tail is but a little longer than the body and head to- 

 gether. The limbs are proportionally well developed. The head and 

 neck constitute two-fifths of the length, from the tip of the snout to 

 the base of the tail. The head is quite depressed. The vertex plate 

 is nearly as broad anteriorly as posteriorly. The prefrontal is occa- 

 sionally subdivided, as in the specimen figured (figs. 11 and 12). The 

 occipitals are larger than in any of the other species. The external 

 series of supraoculars may likewise be noticed for their size. The 

 dorsal scales are disposed upon forty-eight transverse rows, from the 

 occiput to the origin of the tail, constituting twelve longitudinal well- 

 developed series, and two (one on each side) of much smaller ones ; 

 they are moderately keeled on the back. Well-marked keels may be 

 observed on the scales covering the upper part of the limbs. There 

 are fifty-four verticils of scales along the tail, from its origin to its 

 apex, laterally keeled, as well as above. 



