14. vRostRoPHts. 123 
14. UROSTROPHUS*. 
Urostrophus, Dum, § Bibr. iv. p. 77; Gray, Cat. Liz. p. 184. 
Urostrophus, part., Fitzing. Syst. Rept. p. 62. 
Tympanum distinct. Body subcylindrical or slightly compressed, 
covered with small smooth scales, granular on the back; no nuchal 
or dorsal crest. Head with feebly enlarged scales. A transverse 
gular fold; no gular pouch. Digits slightly compressed, with 
smooth lamellz inferiorly. No femoral pores. Tail long, round. 
Lateral teeth tricuspid; pterygoid teeth. No sternal fontanelle. 
Abdominal ribs. 
South America. 
1. Urostrophus vautieri. 
Urostrophus vautieri, Gray, Cat. p. 184. 
Urostrophus vautieri, Dum. § Bibr. p. 78, pl. xxxvii. fig. 1. 
Lzmanctus (Urostrophus) vautieri, part., Fitz. J. ¢. 
Leiosaurus vautieri, Reimh. § Liitk. Vidensk. Meddel, 1861, p. 223. 
Head moderately large; snout rounded, with obtuse canthus 
rostralis ; nostril nearer the end of the snout than the orbit; tym- 
panum oval, as large as the eye-opening ; upper head-scales smooth, 
largest on the snout, smaller on supraorbital region ; scales forming 
regular supraorbital semicircles, separated by one or two rows of 
scales ; occipital enlarged, a little smaller than the tympanum; a 
series of enlarged infraorbitals, second largest ; eight or nine upper 
and seven or eight lower labials. Gular scales small and granular, 
strongly enlarged and polygonal near the labials. Scales on upper 
surface of body and limbs very small, granular, juxtaposed, of lower 
surfaces larger, flat, slightly imbricate, all smooth. Limbs and 
digits moderately elongate; the adpressed hind limb reaches the 
shoulder or the neck in males, not to the axilla in females. Tail 
about once and a half the length of head and body, curling at the 
end, covered with small, keeled scales. Brown above, marbled with 
darker, dirty white inferiorly; tail above with equidistant black 
spots. 
3. 2. 
Total length .... 158 227 millim. 
Head .......... 17 Ql 45 
Width of head .. 12 4 sy, 
Body ........-. 50 71s, 
Fore limb ...... 25 32) 3, 
Hind limb...... 36 si arr 
Peal sg sea eaves 91 135, 
* ? Let us valdivianus, Philippi, Arch. f. Nat. 1861, p. 298.—Valdivia, 
Chili. 
