however, I find th a t they differ in the following particulars. In the present
species the head is concave between the eyes, and forwards nearly to the s n o u t;
m the other, this part is quite plain ; the scales of the head in this species a rj
fla t; in the other they are convex. The colour of this species is uniformly green,
whereas N. Elegans has several markings of a yellow colour, each distinctly
bordered with black.
F a m i l i a — LACERTIDÆ.
G e n u s—A m e i v a . Cuvier.
A m e i v a l o n g i c a u d a . Mihi.
P late X V .—F ig . 1.
Squamis supra-humeralibus, rhomboideis, imbricatis; subfemoraUbus transversim Jiexa-
gonis; abdomhialihts in seriebus decern longitudinalibus dispositis; caudâ, corpore
cum capite plus quam duplo longiore, squamis medio carinatis, et ad margine sub-
carinatis.
H a b ita t, B a h ia B la n c a , N o rth e rn P a ta g o n ia .
D e s c r ip t io n .— H e a d very narrow, much elongated and pointed, th e v e rte x flatten e d ; nostrils ra th e r
l a r p , open, round, d irec ted laterally, an d placed in th e centre o f th e naso-rostral plate ; superciliary
plates th re e in num b er, th e cen tral one th e largest ; suprahume ral scales rhomboidal,
imbricated, n o t b roader th an long, in four series ; those o f th e arm transversely hexagonal ; the
an te rio r surface o f th e thigh, a n d th e inferior o f th e leg, covered with large hexagonal, somewhat
imbricated, scales; caudal scales above q u ad rate, lo n g er th a n broad, with a s trong medial
ca rina, an d th e lateral margins slightly ra ise d ; b en e a th smo o th ; tail very long. A n te rio r ex trem
ity placed against th e body, re ach in g ra th e r more th an h a lf way to th e th ig h ; posterior
ex trem ity e x te n d in g forwards n ea rly to th e ear.
C o lou r .— T h e u p p e r surface o f this beautiful species is dark brown or blackish, with n in e d istin c t
white or yellowish lo n g itu d in a l fasciae e x te n d in g th ro u g h th e whole len g th o f th e neck and
body ; tail with four o f these lines. U n d e r p a rts white.
DIMENSIONS.
Inches. Lines.
Length of the head................................... 0 6
of the n e c k................................... 0 3
of the body................................... i 4
of the tail .................................. 5 2
Total length 7 5
Length of anterior extremity 0 7
of posterior extremity I 5