17. PRIONODACTTLUa. 393 



3. Prionodactylus qiiadrilineatus. 



Cercosaura (Paiitodiictvliisj ((uadriline;ita, BoetUjer, Ber. Senck. Ges. 

 187G, p. 141, pi. — .' 



Allied to the two preceding. Head-shields as in F. oshcmghnessyi, 

 except in the presence of a pair of large postoccipitals, which are 

 quite as large as the oceipitals ; interparietal much larger than the 

 parietals. Collar quite indistinct. Dorsal scales vcrj- narrow, as in 

 P. argulus ; twenty-seven scales, including the ventrals, round the 

 middle of the bodj', and thirty scales from the occiput to the base of 

 the tail. Ventral plates in four longitudinal series. Prceanal 

 plates five, equally large, a pair anteriorly, three on a line pos- 

 teriorly. Nine femoral pores on each side ( cJ )• Olive-brown above ; 

 a whitish streak on each side of the body, beginning from above the 

 ear, and another from axilla to groin ; lower surfaces whitish, 

 throat, sides of belly and base of tail scantily dotted with black. 



millim. millim. 



Total length 152 From end of snout to vent 40-5 



Head 10 Fore limb 13-5 



Width of head G Hind limb 17-5 



From end of snout to Tail lll-o 



fore limb liro 



S. Paul, Brazil. 



4. Prionodactylus manicatus. 



Cercosaura (Prionodactvkis) manicata, O' Shaughn. Proc. Zoul. Soc. 

 1881, p. 231, pi. xxii.'^ tig. 3. 



Head depressed, body moderately elongate. Head-shields normal ; 

 pra^frontals forming a short suture ; interparietals a little larger 

 than parietals ; median occipital small ; temples with large shields 

 above, with small keeled scales inferiorly ; loreal large ; six or seven 

 upper and five or six lower labials ; chin-shields, one anterior and 

 four pairs, the two first pairs forming a suture, the two others 

 widely separated by large shields ; a double longitudinal row of 

 transversely enlarged gulars : collar-sliields six, the two median 

 extremely largo. Dorsal scales strongly keeled, narrow ; lateral 

 scales small, keeled, imbricate : forty-three scales, including the 

 ventrals, round the middle of the body ; thirty-five to thirty-eight 

 scales from the occiput to the base of the tail. Ventrals large, in 

 six or eight rows, on the median rows a little smaller than on the 

 next, those of the outer rows rounded ; eighteen or nineteen trans- 

 verse rows. Proianals five, a small anterior pair and three large 

 posterior, the median very narrow. Digits distinctly toothed in- 

 feriorly. Limbs with large shields ; lower surface of arm and 

 hinder side of thighs granulate ; upper surface of hind limbs with 

 imbricate keeled scales. ^lalo with thirteen or fourteen femoral 

 pores on each side, female with twelve to fourteen. Upper and 

 lateral caudal scales elongate hexagonal, keeled: lower smooth, the 



