Keptiles (Did Amphibians of Illinois. 255 



Family TEID^E. 



Tongue long, bifid, with squaiiiiform papillse. Teeth 

 solid, pleurodont. Head pyramidal, with large, regularly dis- 

 posed plates above. One pair of supranasal plates. Nostril 

 opening in the midst of a plate, or between two plates. Scales 

 of the back granulate or carinate; scales on abdomen large. 

 To these, other characters used by Prof. Cope may be added as 

 follows: A xiphisternal fontanel; premaxillary single; clavi- 

 cles dilated proximally; mesosternum cross-shaped. 



Onemidophorus, Waglek. 



Wagler, Syst. Amph., 1830, p. 154. 



Holbrook, X. A. Herp., 1842, II., p. 109 (Ameiva). 



Hottman, Bronn's Thier-Reich, 1883, VI., Reptilien, p. 1076. 



With two subgular folds. Tongue with no sheath, free 

 behind. Maxillary teeth compressed, the posterior teeth tri- 

 cuspid. Femoral pores present. Scales granulate above, trans- 

 versely elongate and quadrangular on the belly. Digits 5-5. 



Onemidophorus sexlineatus, Linn. 



Lncerta 6-Uneat(i, Linn., Syst. Nat., 1766, p. 364. 

 Cnemidophorus sex-lineatus, Dum. et Bibr., Erp. Gen., 1839, Y., 



p. 131. 

 Ameiva sex-lineata, Holbr., N. A. Herp., 1842, II., p. 109, pi. 15. 

 Cnemidophorus sex-lineatus. Gray, Cat. 8pec. Lizards in Coll. 



Brit. Mus., 1845, p. 21.— Davis and Rice, Bull. 111. State Lab. 



Nat. Hist., I., No. 5, 1883, p. 47; Bull. Chicago Acad. Sci., 



1883. 



Total length about seven inches. Body slender. Tail 

 long, cylindrical, and tapering. Posterior legs much larger 

 than the anterior, with long slender digits. Head small, com- 

 pressed before the eyes and pointed. Scales on the back and 

 sides, the superior and posterior surfaces of the posterior legs, 

 the posterior surfaces of the anterior legs, and on the throat, 

 minute and granular. Scales of the ventral surface of the 

 abdomen large and (juadrangular; about thirty in a longitudi- 

 nal row and eight in a transverse row. Femora with a ridge 

 bearing sixteen pores. Scales of the tail large, verticillated, 

 carinate. Two well-marked gular folds. Ear-opening large, 



