210 SAURIA. 



Fig. 13, is a front view of the head. . - - 



Fig. 14, exhibits the left hand from above. 



Fig. 15, is intended to give a correct idea of the structure and shape 

 of the dorsal scales. 



Fig. 16, is a portion of the granular abdominal zone, taken on the 

 middle region. 



Fig. 17, represents some of the abdominal shields, from the middle 

 region of the abdomen. 



Figs. 14-17, are somewhat magnified views, in order to render the 

 details more apparent. 



2. Elgaeia scincicauda, B. & G. 



(Plate XXIII, figs. 1-9.) 



Spec. Char. — Dorsal scales disposed upon fiftj-two transverse and 

 fourteen longitudinal series. Four unequal postnasal plates, and 

 one loral. Fourth pair of mental shields, large. Preanal shields 

 larger than the abdominal ones. Tail one-fourth longer than the 

 body and head combined. Above brownish-olive, with ten trans- 

 verse brown bands across the neck and back, covering but one row 

 of scales, which are tipped with white. Beneath unicolor. 



Syn. — Tropidolepis scincicaudus, Skilt. Amer. Journ. of Sc. VII, 1849, 202, figs. 

 1-3. 



Elgaria scincicauda, B. & G. Rep. on Rept. in Stansh. Expl. Valley Gr. Salt Lake, 

 Utah, 1852, 348, PI. iv, figs. 1-3. 



Descr. — This species, though closely allied to the preceding one in 

 its general appearance, may, on a closer examination, be easily distin- 

 guished by the proportional development of some organic regions, as 

 well as structural details, which may not be deemed unimportant : 

 and first of all, the head and neck together constitute exactly the 

 third of the length, from the tip of the snout to the vent, whilst these 

 same regions are shorter in E. formosa. The limbs are considerably 

 more developed than in the latter, particularly the anterior pair. The 

 tail not being whole in E. formosa, nothing can be deduced from its 

 proportional length, as restored on the figure, but in comparing the 

 portion that is left, we find fifty-six annular rows of scales, and forty- 

 nine only in E. scincicauda, upon the same extent. Next we find fifty- 



