424 TEIID^. 



long ; prefrontals and frontoparietals small ; interparietal narrow, 

 hexagonal ; three supraoculars ; a loreal ; a row of small infra- 

 orbitals ; temporal shields irregular ; two pairs of large chin-shields, 

 in' contact, followed by a double row of transversely enlarged gulars. 

 Nuchal scales large, transverse, in two rows, smooth. Bronze- 

 brown above, with two whitish longitudinal bands; lower surfaces 

 white. 



millim. millim. 



Total length (tail in- From end of snout 



jured) 112 to vent 47 



Head, to ear-opening 9 Fore limb 10 



From end of snout Hind limb 16 



to fore limb .... 14 



Mono de Garza, Brazil. 



32. IPHISA. 



Iphisa, Gray, Proc. Zool. Soc. 1851, p. 89; Peters. Mon. Berl. Ac. 



18(32, p. 188. 



Tongue rather elongate, arrow-headed. Lateral teeth tricuspid. 

 Head with large regular shields ; frontonasal separating the nasals; 

 prsefi'ontals and frontoparietals present ; nostril pierced in the lower 

 part of a single nasal. EyeHds developed, lower with a transparent 

 disk. Ear exposed. Limbs well developed ; inner finger short, 

 elawless. All the scales roundish-hexagonal, imbricate, smooth, 

 arranged quincuncially, two rows along the back and two along the 

 belly much dilated transversely ; caudal scales lanceolate, keeled. 

 No collar fold. Tail cylindrical. Males with, females without, 

 femoral pores. 



Brazil, Guianas. 



1. Iphisa elegans. 

 Iphisa elegans, Gray, I. c. pi. vi. fig. 3. 



Head depressed, snout short, broad, truncate ; body elongate ; 

 limbs short. Frontonasal much broader than long, sometimes 

 longitudinally bisected ; prsefrontals forming a short suture ; frontal 

 hexagonal, narrower than the frontonasal ; frontoparietals a little 

 larger than the pruefrontals, forming a short suture ; parietals large ; 

 interparietal pentagonal, with straight lateral edges, as long as, but 

 much narrower than, the parietals ; occipitals not distinguishable 

 from the nuchal shields ; supraoculars three, anterior smallest, 

 second largest ; two superposed loreals ; a row of infraorbitals ; 

 temples shielded ; seven upper and six or seven lower labials; chin- 

 shields, one anterior and two pairs, the first pair enormous, forming 

 a very long suture, the second pair very small. Dorsal and nuchal 

 scales forming a double alternating series of twenty-nine or thirty 

 pairs ; these enlarged scales rounded-hexagonal, three times as 

 broad as long behind the occiput, becoming gradually narrower ; 



