278 ANGUID.E. 
fold strong, extending on the neck. Nuchal scales in eight longi- 
tudinal rows. Dorsal scales in fourteen longitudinal rows, the 
laterals smooth, the others obtusely keeled, and forty-seven trans- 
verse rows; ventrals nearly as large as dorsals, in twelve longitudinal 
rows. The adpressed fore limb reaches the posterior border of the 
eye; the length of the hind limb equals two thirds the distance 
from axil to groin. Upper caudal scales more strongly keeled than 
dorsals. Olive above, with a black vertebral line; sides and lower 
surfaces black, spotted with greenish white. 
millim. millim. 
Total length (tail re- Body wa aennietanets 50 
produced) ...... 134 Fore limb ........ 15 
CAG, rcct ta cune an 14 Hind limb........ 21 
Width of head .... 10 
Mexico. 
a. 3, bad state. Mexico. (Type.) 
18. Gerrhonotus monticola. 
Gerrhonotus fulvus (non Boe.), Cope, Journ. Ac. Philad. (2) viii. 
1876, p. 118. 
— monticolus, Cope, Proc. Amer. Philos, Soc. xvii. 1877, p. 97. 
Prefrontal separated from the frontal by a pair of shields. Dorsal 
scales in fifteen longitudinal series, the three or four median rows 
keeled, the others smooth ; forty-five transverse series. Otherwise 
asin G@. moreletit. Colour of upper surface and sides brown, the 
latter a little darker, and bounded above by a narrow black line; a 
somewhat irregular row of small black spots down the median dorsal 
line ; below yellowish olive, the scales of the abdomen with black 
borders, those of the gular and thoracic regions with black centres. 
Total length 148 millim.; length to vent 61 millim. 
Summit of the Pico Blanco (11,500 feet), Costa Rica. 
19. Gerrhonotus moreletii. 
Gerrhonotus wiegmanni (non Gray), Salvin, Proc. Zool. Soc. 1860, 
. 464. 
moreletii, Bocourt, Now. Arch. Mus. vii. 1872, Bull. p. 102, 
and Miss. Sc. Mex., Rept. p. 849, pl. xxi. fig. 1, and xxi. B. fig. 5; 
Giinth. Biol. C.-Am., Rept. p. 41, pl. xxiv. fig. c. 
fulvus, Bocourt, il. cc. p. 104, 352, pl. xxi. B. fig. 6. 
Mesaspis moreletii, Cope, Proc. Amer. Philos, Soc. xvii. 1877, p. 96. 
fulvus, Cope, lc. 
Head-shields smooth ; a large prefrontal, sometimes single and 
forming a suture with the whole anterior border of the frontal, 
sometimes divided into three, the median or larger shield forming 
only a short suture with the frontal; two pairs of small shields 
