23. EUSPONDYLUS. 



Euspondylus, Tschudi, Arch. f. Ifaturg. 1845, p. 160 ; Peters, Abh. 

 Berl. Ac. 1862, p. 206. 



Tongue moderately elongate, arro-w -headed. Lateral teeth bi- or 

 tricuspid, Head with large regular shields ; frontonasal separating 

 the nasals ; pra3frontals and frontoparietals present ; nostril pierced 

 in a single (or divided) nasal. Eyelids developed, lower with a 

 transparent disk formed of several scales. Ear exposed. Limbs 

 well developed, pentadactyle. Dorsal scales smooth or very feebly 

 keeled, quadrangular, juxtaposed, forming transverse series, separated 

 from the ventrals by small scales : ventral plates large, smooth, 

 quadrangular, forming regular longitudinal and transverse series. 

 A strong collar fold. Tail cylindrical. Males with femoral pores, 

 females without. 



Venezuela to Peru. 



Synopsis of the Species. 



I. Labials separated from orbit by a row of very small infra- 



orbitals. 



Dorsal scales much shorter than ventrals ; 



nasal in contact with the frenoorbital ,. 1. strangiilatus, "p. 405. 

 Dorsal scales nearly as long as ventrals ; 



loreal separating the nasal from the 



frenoorbital 2. macuJatus, p. 406. 



II. Infraorbitals large. 



19 transverse series of scales from the chin- 

 shields to the edge of the collar, and 42 

 from occiput to base of tail 3. acutirostris, p. 407. 



