226 ZOOLOGY. 
of that organ to the last fifth of its length. They are smooth upon the anterior fifth, hence 
to the tip conspicuously carinated, particularly upon the middle region; at the base of the tail 
the scales are but slightly larger than on the posterior portion of the body; they are smooth 
everywhere else except, as mentioned, upon the tail. The carination is gradually appearing 
under the shape of a blunt and small protuberance which may be seen upon the posterior ex- 
tremity of the scales. Every other or every third row subdivides as it ascends from the sides 
of the tail towards its upper surface, from the base to about the third of the length, the sub- 
division gradually diminishing in extent until reduced to a few scales upon the middle of the 
upper region ; hence backwards they constitute regular annular rows. The ground-color is 
olivaceous, varying in shade. From the occipital region to the base of the tail there are four 
longitudinal series of rather large black patches. The latter are subcireular or subquadrangu- 
lar, transversally elongated, and provided laterally with a white line or spots, exteriorly again 
margined with a black filet; sometimes the black and central part of the blotch is wanting, in 
which case we have two independent white subrounded spots, margined with black. The 
occipital region is maculated with black. The inferior region of the flanks is vermiculated or 
spotted with brownish black, upon a whitish ground. The upper surface of the anterior limbs 
exhibits confluent lines or spots—some brownish, others whitish ; the posterior limbs are macu- 
lated or else vermiculated with blackish. The upper surface of the tail presents intermingled 
black, brown, and olivaceous spots of various shades. The inferior regions are white; the 
throat, the belly, the thighs, and base of the tail are spotted with blackish brown. 
Collected in the neighborhood of Santiago, Chile. 
It is worthy of remark that Ameiva oculata, mentioned by d’Orbigny in his Travels to South 
America, was erroneously introduced in that work. The specimen from which his figure is 
made, is one of those collected by Claude Gay, in Chile, supposed for a time by the naturalists 
of the Garden of Plants in Paris to have been brought home by Alcide d’Orbigny, whose collec- 
tions were deposited in that establishment, where Claude Gay had likewise sent his. 
The shapes of the dorsal black spots, as described above, agree in the two specimens brought 
home by Lieut. Gilliss. They are at variance with those described and figured by Claude Gay. 
Plate XX XIX, fig. 1, represents Aporomera ornata, in profile and size of life. 
fig. 2, is an under view of the same specimen. 
fig. 3, the head seen from above. 
fig. 4, a side view of the head. 
Genus CNEMIDOPHORUS, Wagl. 
Gen. cuar. Base of tongue not sheathed, moderately long, divided upon its anterior ex- 
tremity into two smooth filets, covered with scaly, rhomboid, and subimbricated papille. Palate 
toothed. Intermaxillary teeth conical and simple; maxillary teeth compressed; the anterior 
simple ; the posterior tricuspid. External opening of nostrils situated either exclusively in a 
single naso-rostral plate, or between several nasals. Eyelids present. Tympanic membrane dis- 
tinct, stretched inside the rim of the auditive aperture; a double transversal fold under the neck. 
Ventral scutelle quadrilateral, flat, smooth, not, or little imbricated, disposed in alternate rows. 
Large scutelle-like plates under the legs. Femoral pores present. Five fingers a little com- 
pressed, not carinated beneath. Five toes similar in structure to the fingers. Tail cyclo- 
tetragonal. 
Syn. Cnemidophorus, Waa. Nat. Syst. Amph. 1830, 154. 
Dum. & Bisr, Erp. Gén. V, 1839, 123. 
