116 IGUANIDA. 
upper and as many lower labials. Male with a gular pouch; gular 
scales smaller than ventrals, strongly keeled, trihedral, the central 
erect. Dorsal and nuchal crests continuous, formed of short conical 
scales; those of the former largest, measuring about half the vertical 
diameter of the tympanum, and frequently arranged in three longi- 
tudinal closely-set rows. Back and sides with very small scales of 
somewhat unequal size; a lateral series of larger scales, from the 
shoulder to the base of the tail; the scales on the flanks minute and 
granular, those on the back a little larger, pointed, and keeled ; 
ventral scales strongly keeled. Limbs and tail as in L. prestabitis, 
the former, however, a little shorter. One or two femoral pores on 
cach side. Pale brown, variegated with darker; a yellowish spot 
behind the ear, sometimes replaced by a longitudinal band of the 
same colour ; tail with rather irregular dark brown annuli; lower 
surfaces yellowish, the male’s throat bluish-black. 
Total length.......... 263 millim. 
COE 65 5, soothe acho dest 33, 
Width of head ........ 25, 
BOY? a Aposctise fe aha tea eee 80, 
Fore limb ............ 59, 
Hind limb ............ 88, 
IAM vseatn'? ate. doa eee 150 ,, 
Ecuador. 
ab SQ. W. Ecuador. Mr. Fraser [C.]. 
c. Her. 2. Guayaquil. Mr. Fraser bet hare) 
d-e. § and her. Sarayacu. Mr. Buckley [C.]. 
6. Enyalioides palpebralis, 
Enyalius palpebralis, Bouleng. Proc, Zool. Soc. 18838, p. 46, pl. x. 
Head large, once and one third as long as broad; canthus ros- 
tralis angular; supraciliary edge much produced posteriorly, with a 
strong denticulation formed by several large pointed scales 3 nostril 
pierced below the canthus rostralis, nearer the orbit than the tip of 
the snout; tympanum vertically oval, nearly as large as the eye- 
opening. Upper head-scales small, irregular, strongly keeled or 
conical; three large conical tubercles behind the supraciliary border. 
followed by an oblique series of smaller conical tubercles; no distinct 
occipital; twelve to fifteen upper and as many lower labials. Male 
with a very slightly developed gular pouch; gular scales smaller 
than ventrals, keeled, the median subconical. A nuchal crest formed 
of four to six large conical scales, the highest measuring the vertical 
diameter of the tympanum, separated from the dorsal crest by an 
interspace nearly equal to its length; a strong dorsal crest, gradually 
diminishing in height to the base of the tail, where it becomes double 
and indistinct ; the highest scale of the dorsal crest measuring three 
fourths the vertical diameter of the tympanum. Scales of the back 
and sides very small, irregular, keeled, intermixed with larger conical 
