26. LIOCEPHALUS. 169 
the rostral; no large supraoculars. Sides of neck not. plicate, 
covered with pointed, imbricate, keeled scales. A well-developed 
dorsal crest. Dorsal scales large, strongly mucronate, strongly 
keeled, the keels forming continuous straight longitudinal lines ; 
laterals and ventrals a little smaller; latter smooth; forty-three 
scales round the middle of the body. Gular scales as large as 
dorsals. The adpressed hind limb reaches the eye. ‘1'ail strongly 
compressed, the crest not quite as much developed as the dorsal. 
Olive above, with ill-defined darker spots; a large black spot on the 
shoulder; throat and breast greenish ; chin and belly black. 
millim, millim 
Total length ...... 235 Fore limb........ 37 
Cat tan ey nanos 19 Hind limb........ 59 
Width of head .... 14 Dail ce iyed Sowden 155 
Body a. eign nares 61 
Ecuador. 
aod. Guayaquil, (Type.) 
14. Liocephalus trachycephalus. 
Holotropis trachycephalus, 4. Dum. Cat. Méth. Rept. p. 70, and 
Arch, Mus. vii. p. 589, pl. xxiii, fig. 1. 
Upper head-scales small, unicarinate ; nasal separated from the 
rostral; no large supraoculars; no distinct denticulation on the 
anterior border of the ear. Sides of neck not distinctly plicate, 
covered with pointed, imbricate, keeled scales. Dorsal crest: a low 
serrated ridge. Dorsal scales moderately large, scarcely mucronate, 
strongly keeled, the keels forming continuous straight longitudinal 
lines ; laterals a little smaller; ventrals nearly as large as dorsals, 
rhomboidal, smooth; forty-seven scales round the middle of the 
body. Gular scales smaller than dorsals. The adpressed hind limb 
reaches the ear. Tail moderately compressed, with slightly serrated 
ridge. Bronze-olive above, metallic green inferiorly; belly and a 
band across the throat black. 
millim. millim 
Total length ...... 241 Fore limb ........ 34 
Mead... css a esis 17 Hind limb........ 54 
Width of head .... 12 Pall lecctieaeudatand 165 
Body ccc 59 
Colombia. 
aod. Bogota. 
15. Liocephalus guentheri. (Pxiare XIII.) 
Liocephalus ornatus, (non Gray) Gtiinth. Proc. Zool. Soc. 1859, p. 408. 
trachycephalus, (nox A. Dum.), O’Shaughn. Proc. Zool. Soc. 
1881, p. 244; Bouleng. Ann. § Mag. N. H. (5) ix. 1882, p. 458. 
Upper head-scales small, unicarinate; nasal separated from the 
