13. LEPOSOMA. 14. LOXOPHOLIS. 387 



2. Leposoma dispar. 



Lepo.soma dispar, Peferj^, Mun. Berl. Ac. 1880, pp. 217, -100, pi. — . 

 fig. 2. 



Closely allied to the preceding ; differing chiefly in the following 

 points : — Frontonasal obtusely angular posteriorly ; interparietal 

 shorter and broader, much larger than parietals ; four pairs of chin- 

 shields, the three anterior in contact ; a complete row of smaller 

 scales across the throat, from one ear to the other. Scales distinctly 

 broader; abdominals rounded or truncate posteriorly, mucroiiatc. 

 Dark brown above, black-dotted ; on each side of the back a light 

 line, commencing from the supraocular region ; sides of head with 

 oblique black lines ; lower surfaces yellowish white. 



millim. millira. 



Total length 104 Fore limb 12 



To base of tail .... 37 Hind limb 17 



Caceres, Colombia. 



14. LOXOPHOLIS. 



Loxopholis, Cope, Proc. Ac. Philad. 1868, p. 305. 



Head with large regular shields ; frontonasal separating the 

 nasals ; prefrontals and frontoparietals present. Eyelids developed, 

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

 loped, each with five digits. Scales imbricate, arranged in oblique 

 rows or quhicuncially, the exposed jjortion triangular, strongly 

 keeled ; lateral and gular scales like the dorsals ; ventrals broad, 

 quadrate, smooth. Xo collar. Tail cylindrical. 



Colombia. 



1 . Loxopholis rngiceps. 

 Loxopholis rugiceps, Cope, I. c. 



Upper head-shields rugose, with longitudinal strife ; two loreala 

 or pra^oculars between nasal and eye ; four sujjraoculars ; fronto- 

 nasal as long as broad ; pra;frontals largely in contact ; upper labials 

 five, long and narrow, third and fourth under orbit, with a narrow 

 series of scales between ; five long and narrow lower labials ; chin- 

 shields large, one anterior and five pairs, tlie first two pairs in 

 contact. Twenty rows of lance-triangular scales on back and both 

 sides, and four rows of smooth abdominal scales, which are broader 

 than long. Six large prasanal plates, five reaching the margin, the 

 two outer narrow, the median short. Scales of the limbs large, 

 keeled. Caudal scales like those of the back of P<intodactj/lus ; keels 

 stronger below than al)ove. Above ycllowisli brown, with a narrow 

 blackish band on each side from the upper margin of the car to near 

 the end of the tail ; a median pair of bands appear near the rump, 

 and continue half the length of the tail, but are very indistinct ; the 



2o2 



