19. PI.ACOSOMA. 397 



regular transverse series ; lateral scales smaller, feebly keeled ; 

 ventral plates large, quadrangular, smooth, arranged in regular 

 loncfitudinal and transverse series, A collar fold. Tail cylindrical. 

 Male with prosanal and femoral pores. 

 Brazil. 



1. Placosoma cordyliniim. 



Plac'osoma cordyliniim (Fitz.), Tschndi, I. c. p. 51. 

 Cercosaura (Urosam-a) glabella, Peters, I. c. pi. — . fig. 1. 



Head depressed, pointed ; body rather short. Upper head-shields 

 as in Cercosaura, but no median occipital ; temples with rather 

 large shields ; seven upper labials, only a row of granular scales 

 separating them from the lower eyelid ; six lower labials ; chin- 

 shields, one anterior and four pairs, the anterior two forming a 

 suture, the others widely separated ; gular scales irregular, juxta- 

 posed, largest between the chin-shields and on the median line in 

 front of the collar, where they form a short double longitudinal 

 series ; collar-shields six or seven. Dorsal scales large, about equi- 

 lateral, slightly rounded posteriorly, slightly imbricate, smooth ; 

 they form regular transverse series, which are interrupted on the 

 median line of the back, where the series alternate; the shields on 

 each side the dorsal line the largest ; on the flanks the scales become 

 gradually smaller and more irregular, forming obli(]ue as well as 

 transverse series, and are rather indistinctly keeled ; twenty scales 

 round the body (including ventrals), and thirty-three from occiput 

 to sacrum inclusively. Ventral shields not larger than dorsals, in 

 six longitudinal and twenty-two or twentj--three transverse series. 

 Pra^anal shields four, two median and two larger laterals. Limbs 

 with large shields ; hinder side of thighs granular. Males with an 

 uninteirupted series of femoral and jn-a^anal pores ; twenty pores 

 altogether. Tail very long, gradually tapering to a fine point, 

 covered with quadrangular scales forming annuli ; the scales on the 

 upper and lateral surfaces longer than broad and very slightly 

 keeled, those on the lower surface equilateral, smooth, and forming 

 two longitudinal series. Brownish yellow above, with a brown 

 band along each side, commencing from the snout and passing 

 through the eye ; limbs with a few yellow spots ; a median series of 

 brown spots on the upper surface of the tail ; lower surfaces cream- 

 coloured, finely dotted with brown. 



millim. millim. 



Total length (tail injured) VJS From end of snout to vent 43 



Head 11 Fore limb 13 



AVidth of head 6 Hind limb 18 



From end of snout to fore 

 limb 17 



Erazil. 



a. J- Hio Janeiro. Mrs. Fry [P.] 



b. d- i^ii^^il. T. Bell/Esq. [P.]. 



