378 TEIIDJ3. 



2. Dicrodon calliscelis, 

 Dicrodon calliscelis, Cojte, Journ. Ac. Philad. (2) viii. 1876, p. 163. 



The inner cusp of each tooth smaller than the outer. Nostril in 

 the anterior nasal close to the posterior and inferior suture. Frontal 

 narrow behind, angulate in front, divided transversely by a suture 

 at the penultimate supraocular scute ; frontoparietals very small, 

 separated by the small interparietal, which is in contact with the 

 frontal ; two small suboval parietals on each side, and ten or twelve 

 large scales surrounding them behind ; four supraoculars, the last 

 two separated from the frontal by granules ; five upper and five lower 

 labials ; six pairs of large chin-shields, the last three smaller and 

 separated by two plates from the labials, the anterior pair in contact ; 

 gular scales small, smooth, a wide band of smaller scales separating 

 them from those of the collar ; margin of collar granular ; its middle 

 with five transverse rows of unequal transverse scales. Dorsal scales 

 commencing as granulations on the interscapular region, and gradually 

 increasing in size until they are similar in size to the large ones 

 which cover the tail in whorls ; like the latter they are keeled, the 

 keels forming continuous lines ; there are thirteen series at the 

 groin, and eighteen one third the length behind the axillae ; nuchal 

 scales and those of the sides of the neck and body granular. Ventral 

 plates in eight longitudinal rows. Prceanals in three longitudinal 

 series of alternating rhombic plates. Posterior face of arm, postero- 

 superior faces of fore arm, superior and posterior faces of femur, 

 and superior face of tibia granular ; other faces of limbs scutate. 

 Femoral pores eighteen. Olive above, becoming yellow posteriorly 

 and on the tail ; a dark line bounding the dorsal scales on the 

 side, and a row of small blackish spots along the middle of the 

 granular lateral band ; femur yellow behind, with two parallel 

 black bands ; tail with light bluish spots on the sides ; lower sur- 

 faces yellowish olive. 



millim. millim. 



Total length 343 From snout to vent . 99 



Head (to ear) 22 Hind limb 73 



Width of head 14 



Pacasmayo, coast of Northern Peru. 



9. TEIUS. 



Teiu9, part., Merrem. Tent. Syd. Amph. p. 60. 

 Teius, Fitzing. N. Classif. Rept. p. 21. 



Acrantus, Wagler, Syst. Amph. p. 154 ; Wiegm. Herp. Mex. p. 8 ; 

 Bum. k Bihr. v. p. 141 ; Gray, Cat. p. 23. 



Tongue moderately elongate, not retractile, widened and emar- 

 ginate posteriorly. Lateral teeth compressed transversely, bicuspid. 

 Head with large regular shields ; nostril pierced in the anterior nasal. 

 Eyehds developed. Ear exposed. Limbs well developed, anterior 

 with five, posterior with four digits, the fifth being rudimentary. 

 Dorsal scales small ; ventral plates large, subquadrangular, smooth, 



