39G TEIID^. 



granules ; two longitudinal rows of large imbricated transverse gular 

 shields ; three collar-shields. Dorsal scales very large, slightly 

 rounded posteriorly, imbricate, a little oblique, with strong keels 

 forming straight continuous lines along the back ; they form eight 

 longitudinal series, and, including the nuchal scales, which are more 

 irregular and feebly keeled, thirty transverse series ; lateral scales 

 much smaller, feebly keeled, forming rather irrregular transverse 

 series. Ventral plates large, in six longitudinal and twenty trans- 

 verse series, the outer series smallest. Praeanal plates normally 

 four, a small anterior pair and a very large posterior ; these 

 shields are sometimes more divided. Fore limbs with large smooth 

 shields ; hind limbs inferiorly with very large smooth shields ; scales 

 on ujiper face of tibia keeled ; posterior femoral scales granular. 

 Five femoral pores in the male, one or two in the female. Tail 

 long, gradually tapering to a fine point, covered with quadrangular 

 scales forming regular annuli ; those on the upper and lateral sur- 

 faces longer than broad and keeled, those on the lower surface 

 broader than long, smooth, and arranged in two longitudinal scries. 

 Olive above ; females uniform, males with a lateral series of large 

 black ocelli with white centre * ; lower surfaces yellowish white. 



millira. raillim. 



Total length 1 74 From end of snout to vent 54 



Head 13 Fore Umb 18 



Width of head 7 Hind limb 24 



From end of snout to fore Tail 120 



limb 20 



Brazil. 



a. $ . Pernambuco Mrs. J. P. G. Smith [P.]. 



(Type oi Emminia olivacea.) 



b. ?. Para. 



19. PLACOSOMA. 



Placosoma, Tschudi, Arch.f. Naturg. 1847, p. 50. 

 Urosaura, Peters, Mon. Berl. Ac. 1870, p. G41. 



Tongue moderately elongate, arrow-headed. Lateral teeth com- 

 pressed, hi- or tricuspid. Head with large regular shields ; fronto- 

 nasal separating the nasals ; prtefrontals and frontoparietals present ; 

 nostril pierced in the middle of a single nasal. Eyelids developed, 

 lower with a transparent disk composed of several scales. Ear 

 exposed. Limbs well developed, pentadactyle. Dorsal scales 

 large, subquadrangular, slightly imbricate, smooth, arranged in 



* It seems to me that the presence of these ocelli is a sexual character ; the 

 type specimen which has them is a male, whilst the two specimens in the 

 British Museum {H olivacea) as well as Peters's C. lutmilis, which show no trace 

 of such markings, are females. This view is besides fortified by our knowledge 

 of Prionodactyius oshaughnefsyi, in which species the ocelli are much less 

 distinct in the females. 



