390 TEIID.. 
broad frontonasal; two prefrontals, forming a short suture; a 
frontal; two frontoparietals; a pair of large pariteals separated by 
an equally long, narrower interparietal; no occipital; three large 
supraoculars and a minute posterior fourth; a loreal and a freno- 
orbital; a row of small infraorbitals ; temples with small irregular 
shields; seven upper and six lower labials ; chin-shields very large, 
three anterior pairs forming a suture ; a double longitudinal row of 
large transverse gulars ; collar-shields five, elongate. Dorsal scales 
narrow, exactly similar to those of Heterodactylus, forming regular 
transverse series which are not at all interrupted on the median 
line of the back, and are not separated from the ventrals by any 
smaller scales; thirty-nine scales round the middle of the body, 
including ventrals; twenty-eight scales from occiput to sacrum 
inclusively. Ventral plates longer than broad, strongly rounded 
and overlapping posteriorly, also very similar to those of Meterodac- 
tylus; they form eight or ten longitudinal and eighteen transverse 
series. Four principal preanals, two median, with their points 
touching, and two lateral. Fore limb with large shields, granulate 
under the arm; hind limb with large shields anteriorly and inferiorly ; 
hinder side of thighs granulate ; upper side of tibia with very small 
keeled scales. Tail with a distinct groove along the side; the 
scales narrow, forming regular imbricate verticilles, the upper 
and lateral keeled and sharply pointed, the lower smooth and 
obtusely pointed posteriorly. Light reddish brown above, reticulated 
with blackish and with longitudinal series of small light spots; head 
variegated with blackish ; lower surfaces cream-coloured, lips and 
throat black-spotted. 
millim. millim. 
Total length ........ 118 From end of snout to vent 43 
Head, as )s duane wows 11 Fore limb ............ 12 
Width of head........ 6°5 Hind limb ............ 19 
From end of snout to fore Tall anc. cde nce eeataeeins 75 
limbenicacgeve sas 17 
Ecuador. 
a Q. Canelos. Mr. Buckley [C.]. (Type.) 
17. PRIONODACTYLUS. 
Pantodactylus, part., Peters, Abh. Berl. Ac, 1862, p. 182. 
Prionodactylus, O’Shauyhn. Proc, Zool. Soe. 1881, p. 231. 
Tongue moderately elongate, arrow-headed. Lateral teeth com- 
pressed, bi- or tricuspid. Head with large regular shields; fronto- 
nasal separating the nasals, prefrontals and frontoparietals present ; 
nostril pierced in the middle of a single nasal, or in the suture be- 
tween two nasals. Eyelids developed, lower with a transparent 
disk composed of several scales. Ear exposed. Limbs well de- 
veloped, pentadactyle. Dorsal scales large, hexagonal-lanceolate, 
