278 ANGUIDJE. 



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-seveu 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. millini. 



Total length (tail re- Body 50 



produced) IS-i Fore limb 15 



Head 14 Hind limb 21 ■ 



Width of head .... 10 



Mexico. 



a. S , bad state. Mexico. (Type.) 



18. Gerrhonotus monticola. 



Gerrlionotus fulvus {>ion Boc), Cope, Jvurn. Ac. Philad. (2) viii. 



1876, p. 118. 

 monticolus, Cope, Proc. Ayner. Philos. Soc. xvii. 1877, p. 97. 



Pra'frontal 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 

 as in O. moreJetii. 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 143 millim. ; length to vent 61 millim. 



Summit of the Pico Elanco (11,500 feet), Costa Eica. 



19. Gerrhonotus moreletii. 



Gerrhonotus wiegmanni {nan Gray), Salvin, Proc. Zool. Soc. 1860, 



p. 454. 

 moreletii, Bocourt, Nnnv. Arch. Mvs. vii. 1872, Bull. p. 102, 



and Miss. Sc. Mex., Eept. p. 349, pi. xxi. fig. 1, and xxi. B. tig. 5 ; 



Giinth. Biol. C.-Am., licpt. p. 41, pi. xxiv. tig. c. 

 fulvus, Bocourt, 11. cc. p. 104, 352, pi. xxi. b. fig. 6. 



Mesaspis moreletii, Cope, Proc. Amer. Philos. Soc. xvii. 1877, p. 96. 

 • f idvus, Co2)e, I. e. 



Head-shields smooth ; a large prsefrontal, 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 



