9, TEius. 379 



forming regular series. A double collar fold. Femoral pores. Tail 

 cyclotetragonal. 



South-eastern South America. 



1. Teius teyou. 



Acrantus teyou, Grai/, Cut. p. 23. 

 Lacerta teyou, Daitd. Hi'pt. iii. p. 195. 

 Teius viiidis, Merr. Tent. p. 60. 

 Ameiva teiu, Lichtenst. Verz. Douhl. p. 91. 

 Teius teyou, Fitzinc/. N. Class, p. 51. 

 Acrautus viridis, XVagl. Syst. Amph. p. 154 ; Dum. <§■ Bihr. v. p. 143 ; 



Hensel, Arch.f. Nat. 1868, p. 347. 

 Ameiva coelestis, I)' Orb. Vol/. Amer. Mer., Rept. p. 2, pi. v. 



tigs. 1-5. 

 Dicrodou coelestis, Peters, Mon. Berl. Ac. 1869, pp. 64, 433, & 720. 



Habit oi Lacerta viridis. Upper head-shields : a frontonasal, a pair 

 of prsefrontals, a frontal, a pair of frontoparietals, three small 

 parietals ; four supraoculars, the three posterior forming a disk en- 

 tirely surrounded by granules ; occipital region covered with small 

 scales ; rostral frequently forming a suture vrith the frontonasal ; 

 a postnasal, a loreal, a prseorbital, three infraorbitals ; six or seven 

 tipper and as many lower labials ; chin-shields, one anterior and five 

 to seven pairs, the posterior separated from the labials by another 

 row of shields ; a broad transverse band of slightly enlarged gular 

 scales ; enlarged mesoptychial scales varying considerably in size, in 

 two or three rows. Dorsal scales granular, smooth. Ventral plates 

 in eight or ten longitudinal, and thirty-three to thirty-six transverse 

 series. Several irregular pmeaual plates. Two rows of brachial 

 plates, outer small, inner continuous with outer series of antebrachials ; 

 latter in two or three rows, outer very large. Femorals in seven or 

 eight rows, one of which is much enlarged ; tibials in three or four 

 rows, outer largest. Femoral pores fifteen to twenty -one. Caudal 

 scales narrow, four-sided, strongly keeled above, feebly beneath. 

 Green above, the sides sometimes brownish ; a series of regular 

 transverse black spots on each side of the back ; two yellow black- 

 edged lateral lines on each side, the upper commencing from above 

 the ear, the lower extending from the shoulder to the hind limb ; 

 flanks black-spotted ; a yellow, black-edged band along the hinder 

 side of the thighs ; lo\\ er surfaces yellow. 



millim. millim. 



Total length 290 248 



Head 24 24 



Width of head 17 15 



Body 76 94 



Fore limb 33 34 



Hind limb 63 65 



Tail 190 130* 



Southern Brazil, Paraguay, Uruguay, Argentine Republic. 



* Tail reproduced. 



