408 TEIIDJS. 



millim. millim. 



Total length 249 From end of snout to 



Head 22 vent ' 94 



Width of head 12-5 Fore limb 30 



From end of snout to fore Hind limb 41 



limb 37 Tail 155 



Ecuador. 

 «. J . Sarayacu. Mr. Buckley [C.]. (Type.) 



24. ARGALIA. 



Argalia, Gray, Ann. ^ Mag. N. H. xviii. 1846, p. G7 ; Peters, Abh. 

 Berl. Ac. 1862, p. 213. 



Tongue moderately elongate, arrow-headed. Lateral teeth com- 

 pressed, bi- or tricuspid. Head with large regular shields ; fronto- 

 nasal separating the nasals ; praefrontals and frontoparietals present ; 

 nostril pierced in the middle of a single nasal. Eyelids developed, 

 lower with a non-transparent disk. Ear exposed. Limbs well 

 developed, pentadactyle. Scales perfectly smooth, quadrangular, 

 juxtaposed, forming regular transverse series on the back, and trans- 

 verse and longitudinal series on the belly; the abdominal scales 

 considerably smaller than the dorsals ; the lateral scales smaller and 

 irregular. A strong collar fold. Tail cylindrical. Femoral pores 

 in both sexes. 



Venezuela and Colombia. 



1. Argalia marmorata. 



Argalia marmorata, Gray, I. c. 



olivacea, Gray, Proc. Zool. Soc. 1847, p. 97, and 1858, pi. xv. 



fig. 1. 

 Gerrhonotus poecilochilus, ZicM. Nomencl. JRept. Mus. Berol. p. 16. 

 Ecpleopus (Argalia) oliraceus, Peters, I. c. 



( ) marmoratus, Peters, I. c. 



( ) pcecilochilus, Peters, I. c. 



Appearance somewhat similar to that of a Gerrlionotus. Head 

 depressed, large and distinct from neck in the males. Frontonasal 

 longer than broad, pentagonal ; a pair of praefrontals formiug a 

 short or very short suture ; frontal short ; frontoparietals moderate ; 

 parietals forming an oblique suture with a large supratemporal ; 

 interparietal hexagonal, longer than the parietals ; a pair of large 

 occipitals ; four supraoculars ; a loreal ; a row of rather large infra- 

 orbitals ; temples with large shields ; seven or eight upper and six 

 or seven lower labials ; chin-shields, one anterior and four pairs, the 

 two first pairs forming a suture ; gular scales squarish, subequal, 

 forming transverse rows ; collar-shields nine to eleven ; fourteen to 

 sixteen transverse rows of scales between the chin-shields and the 

 edge of the coUar. Scales quadrangular, at least twice as long as 



