104 IGUANIDE. 
a 9. Orizaba. 
b. Her. Yucatan. 
c. Her. Mexico. Dr. J. E. Gray [P.]. 
d. Her. Mexico. M. Sallé [C.]. 
8. LEMANCTUS. 
Lemanctus, part., Wiegm. Herp. Mex. pp. 16, 45; Dum. § Bibr. 
iv. p. 70. mie, 
Lemanctus, Fitsing. Syst. Rept. p. 63; Gray, Cat, Liz. p. 185; 
Bocourt, Miss. Sc. Mex., Rept. p. 114; Bouleng. Bull. Soe. Zool. 
France, 1877, p. 460. 
Tympanum distinct. Head plane above, shelving forwards, the 
occipital region more or less raised and produced beyond the occiput. 
Body compressed, covered with imbricate keeled scales ; dorsal crest 
feebly developed or absent. A strong transverse gular fold; no 
gular pouch. Limbs very long; infradigital lamelle with a median 
tubercle-like keel. No femoral pores. Tail very long, round. 
Lateral teeth tricuspid ; pterygoid teeth. Clavicle loop-shaped 
proximally. No sternal fontanelle. No abdominal ribs. 
Central America. 
Synopsis of the Species. 
I. Scales on upper surface of snout much larger than those on 
occipital region. 
A. A series of projecting triangular scales on the posterior contour 
of the head; a feeble dorsal crest. 
57 to 61 scales round the middle of the 
DOdV cir auadanies: eawauincimaiea es etuats 1. serratus, p. 104. 
45 to 51 scales round the middle of the 
DOG at cthcc au pectin at Sele Mereea Seas 2. alticoronatus, p.105. 
B. No distinct serration on the posterior 
contour of the head; no dorsal crest.. 3. longipes, p. 105. 
II. Scales on upper surface of snout not 
distinctly larger than those on occipital 
region; no dorsal crest ............ 4, deborrii, p. 106. 
1. Lemanctus serratus. 
Lemanctus longipes, (non Wiegm.) A. Dum. Arch. Mus. viii. p. 512, 
pl. xxi. fig. 4; Bocourt, lc. p. 114, pl. xvii. fig. 4. 
serratus, Cope, Proc. Ac. Philad. 1864, p. 176; Bocourt, J. c. 
p. 116; Bouleng. 4. ¢. p. 463, pl. vii. fig. 8. 
Upper head-scales rugose, very large on upper surface of snout, 
where they usually form three regular pairs; the posterior part of 
the head more elevated in the males than in the females, bordered 
by projecting triangular ribbed scales; labials large ; tympanum 
