39. cacuRYX.—40. HOPLOCERCUS. 199 
lamelle inferiorly, A short series of femoral pores, Tail very short, 
flattened, with whorls of large spines on its upper surface. Lateral 
teeth tricuspid. 
Yucatan, 
1. Cachryx defensor. 
Cachryx defensor, Cope, 7. v., and Proc, Am. Phil. Soe. 1869, pl. x.; 
Bocourt, lc. 
Head longer than broad ; loreal region concave; nostril on canthus 
rostralis, lateral ; tympanum as large as the eye, without marginal 
serrations ; upper head-scales small, uniform, a little enlarged on 
the snout ; no enlarged occipital. Sides of neck plicate. Scales of 
body small, slightly imbricate, homogeneous, smooth, in transverse 
and oblique longitudinal series, larger on the rump, smaller on the 
sides ; a slightly larger vertebral series ; ventral scales smooth, as 
large as dorsals. Scales of fore limb moderate, some of those of 
femur and tibia much larger, spiniferous. Digits short. Femoral 
pores six to nine. Tail shorter than the body ; caudal whorls fif- 
teen, the scales below narrowed, keeled, the carina prolonged into a 
flat spine; spiniferous superior whorls seven, spines nearly erect, 
those of the median row smaller. Bright olivaceous; shoulder and 
two bands on humerus, and the anterior part of dorsum, with inter- 
scapular region, black, the latter with two cross series of green 
spots, more or less distinct on the whole body in younger specimens ; 
in older specimens median dorsal region bright rufous. 
millim. millim. 
Total length .......... 215 From snout to vent .. 127 
From snout to gular fold 41 Fore limb .......... 54 
Yucatan. 
40. HOPLOCERCUS. 
Hoplocercus, Fitzing. Syst. Rept. p. 78; A. Dum. Arch. Mus. viii. 
61 
Berhycoretts (Duges & Brac.), A. Dum. Rev. § Mag. Zool. vi. 1854, 
p. 558. 
Tympanum distinct. Body depressed; no dorsal crest; dorsal 
lepidosis heterogeneous. Upper head-scales small. A strong trans- 
verse gular fold; no gular sac. Digits compressed, with keeled 
lamell inferiorly. A few femoral pores. Tail short or moderate, 
flat, or cylindrical, with whorls of spinose scales. Lateral teeth tri- 
cuspid ; pterygoid teeth. No sternal fontanelle. Abdominal ribs. 
South America. 
1. Hoplocercus spinosus. 
Hoplocercus spinosus, Fitzing. 1.c.; A. Dum, 1. c. p. 562. 
Pachycercus aculeatus (Dugées § Brac.), A. Dum, lc. pp. 239, 661, 
pl. xi. 
