4. MONOPLOCUS. — 5. AMEIVA. 343 



transverse rows. Two rows of keeled collar scales, the secoud 

 largest. Gular scales small, equal, smooth. Bluish, with a median 

 light band from the middle of the back to the end of the nose, 

 covering the muzzle and front as far as the frontoparietal scuta ; a 

 light band from orbit to near femur and another from tympanum to 

 groin, the intervening space crossed by vertical black spots and bars ; 

 lower surfaces green. 



This species is established on a single, young, specimen measuring 

 40 millim. from snout to vent. 



Moyobamba, Peru. 



4. MONOPLOCUS. 



Monoplocus, Giinth. Proc. Zool. Soc. 1859, p. 404. 



" Tongue elongate, free, not sheathed, terminating in two very 

 fine points. Palatine teeth none ; the posterior teeth in the jaws 

 bi- or tricuspid. Tympanum distinct. Throat with a single fold. 

 Scales of the back exceedingly small, those of the sides granular : 

 gular and ventral shields keeled. Tail rounded, covered with keeled 

 and verticillated scales of moderate size. Femoral pores none." 



1. Monoplociis dor sails. 

 Monoplocus dorsalis, Giinth. I. c. 



This species has been identified with Centropyx pelviceps (cf. 

 O'Shaughnessy, P. Z. S. 1881, p. 228), from the examination of a 

 specimen labelled as the type of Monoplocus dorsalis. Although 

 that specimen agrees pretty well in size, proportions, and coloration 

 with Giiuther's detailed description, it differs in several points 

 which certainly cannot be attributed to difference in the mode of 

 describing or to oversight: — 1. The tongue is distinctly sheathed 

 at the base ; 2. Femoral pores are as distinct as can be ; 3. There 

 are fourteen instead of eleven rows of ventral shields : 4. The dorsal 

 scales are not smooth and imbricate, but strongly keeled and juxta- 

 posed. There is therefore no doubt that a young specimen of 

 Centropyx pelviceps has been substituted in the bottle containing tho 

 original Monoplocus dorsalis, which has disappeared from the col- 

 lection. 



W. Ecuador. 



5. AMEIVA. 



Ameiva, C'uv. Rey)ie Anim. ii. p. 27; Fitzing. N. Classif. Rept. p. 21 j 

 Diim. ^ Bibr. v. p. 92 ; Graif, Cat. p. 17 ; Cope, Proc. Ac. Philad. 

 1862, p. 61 ; Bocourt, Ms.s. Sc. Mex., Rept. p. 250. 



Teius, part., Merr. Tent. Si/st. Amph. p. fSO. 



Cnemidophorus, part., IVaghr, Syst, Amph. p, lo4; Wieytn. Ifcrp. 

 Mex. p. 9. 



Holcoaus, Cope, I. r. p. (50. 



Tongue long, narrow, more or less retractile at the base. Lateral 



