G, CXKMIDOl'HORUS, — 7. CALLOPISTES. 37") 



millim. inillim. 



Head 13 From end of snout to tore 



Width of head 8 limb 19 



From end of snout to inter- From end of snout to vent 55 



parietal plate 9 Fore limb 19 



AVidth at posterior corners Hind limb 34 



of supraocular regions . 5*5 



^Northern Patagonia. 



a. (S • Bahia Blauca. C. Darwin, Esq. [C.]. (Type.) 



h. (S . ? Ilaslar Collection. 



-i^r-enemidophorus'lreterolepis. 



Cnemidophorus heterolepis, Tschudi, Faun. Per., Her p. p. 40. 

 Verticaria heterolepis, Cope, Proc. Amer. Philos. Soc. xi. 18G9, p. 158. 



Dorsal scales smooth and granular on the nape and anterior part 

 of the back, then becoming gradually larger, rhomboidal, keeled 

 and imbricate. Ventral plates in ten rows. Prseanal plates irregu- 

 lar, numerous. Frontoparietals united. Femoral pores seventeen to 

 nineteen. Olive-green above ; young with several longitudinal dark 

 bands ; throat dirty white, collar and breast shiny black ; belly 

 bright bluish green. 



Eastern Slope of Andes, Peru. 



7. CALLOPISTES. 



Callopistes, Gravenh. N. Ada Ac. Leop.-Carol. xviii. 1838, ii. p. 743; 



Gray, Cut. p. 17. 

 Aporomera, Dam. Sf Bihr. v. p. 69. 

 Tejovaranus, Steinclachn. Denkschr. Ah. Wien, xxxviii, 1878, p. 93. 



Tongue long, narrow, bilobate and retractile at the base. Teeth 

 compressed longitudinally, bi- or tricuspid. Head with very small 

 shields ; anterior nasal separated from its fellow ; nostril pierced in 

 the suture between the two nasals. Eyelids developed. Ear exposed. 

 Limbs well developed, pentadactyle. Dorsal scales small, juxtaposed, 

 equal ; ventral plates rather small, elongate-quadrangular, smooth, 

 forming regular series. A double collar-fold. No femoral pores. 

 Tail cyclotetragonal. 



Peru, Chili. 



1. Callopistes maculatus. 



Callopistes celestis (non I)' Orb.), Gray, Cat. p. 17. 

 Callopistes maculatus, Gravenh. I. c. p. 744, pi. Iv. fig. 1. 

 Aporomera ornata, Dwn. 8f Bihr. v. p. 70; Guichfn. in Gay's Chile, 



Zool. ii. p. 58, pi. iii. fitr. 1 ; Phillppi, licise Atacama, p. 168. 

 Ameiva oculata, IfOrhiyny, Vuy. Amer. Mer., Itept. p. 9, pi. v. 



figs. 6-9. 

 Aporomera ocellata, Guichen. i. c. p. 61. 



In habit somewhat .similar to L'tcertn occJlata. Upper surface of 



