19. PrLAcosoMA,. 397 
regular transverse series; lateral scales smaller, feebly keeled ; 
ventral plates large, quadrangular, smooth, arranged in regular 
longitudinal and transverse series. A collar fold. Tail cylindrical. 
Male with preanal and femoral pores. 
Brazil. 
1. Placosoma cordylinum. 
Placosoma cordylinum (F%tz.), Tschudi, l. c. p. 51, 
Cercosaura (Urosaura) glabella, Peters, /. c. pl. —. 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 torm 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 oblique 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 twenty-three transverse series. 
Preeanal shields four, two median and two larger laterals. Limbs 
with large shields ; hinder side of thighs granular. Males with an 
uninterrupted series of femoral and preanal 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) 128 From end of snout to vent 43 
Head se coped ea gueences 11 Fore limb ............ 13 
Width ofhead ........ 6 Hand; mb os o5 cscs os 18 
From end of snout to fore 
dimlb. vay Grae tenes 17 
Brazil. 
as, 1s Rio Janeiro. Mrs. Fry [P 
“ae Brazil, T. Bell, Esq. [P.]. 
