XENOSAURIDZ.—ZONURID &. 251 
of three or four transversely dilated scales on the supraocular 
region; nostril pierced in a single nasal; rostral quadrangular 
low, three times as broad as high; ten to thirteen upper and ni 
or ten lower labials ; mental short and broad, subtriangular or sub- 
pentagonal; two or three rows of enlarged scales bordering the 
lower labials; gular region granular. Two strong transverse gular 
folds. Body depressed, covered above with irregular minute 
granules intermixed with small round or oval, conical or obtusely 
keeled tubercles forming irregular longitudinal series; a more or 
less distinct fold from axilla to groin. Belly covered with smooth 
squarish scales forming thirty-six transverse series (from fore arm 
to preanal region); a transverse series in the middle of the belly 
contains about twenty scales. Limbs covered above with granules 
and tubercles as on the body, inferiorly with uniform granules ; 
digits slender, cylindrical, slightly swollen at the articulations, in- 
feriorly with a series of transverse smooth scales. Tail cylindrical, 
tapering, about as long as head and body, with cross rows of 
subtubercular scales above, of larger quadrangular flat ones in- 
feriorly. Yellowish-brown, marbled with blackish, with four or 
five more or less marked transverse light bands on tho back, and 
dark and light annuli on the tail. 
millim millim 
Total length ...... 240 Fore limb ........ 45 
TGA 5, scan a acaneaes aes 30 Hind limb........ 57 
Width of head .... 24 A eer ae ee eee 120 
BODY sess dietjusreuanat ahs 90 
Southern Mexico. 
a-c. Ad. Cordova. M. Sallé(C.].  (Types.) 
d, Ad, Oaxaca, M. Sallé [C.]. 
Fam. 8. ZONURID. 
Cordyloidea, part., Fitzinger, Neue Classif. Rept. 1826. 
Autarchoglosse, part., Wagler, Syst. Amph. 1830. 
Chameesauri, part., Ptychopleuri, part.. Wiegmann, Herp. Mex. 
1834. 
Chalcidiens, part., Duméril § Bibron, Erp. Gén. v. 1839. 
Zonuride, part., Chamesauride, Gray, Cat. Liz, 18465. 
Zonuride, part., Cope, Proc. dm. Assoc, Adv. Sc. xix, 1871. 
Zonuridee, Boulenger, Ann. § Mag. N. H. (5) xiv. 1884. 
Tongue short, villose, scarcely protractile, entire or very feebly 
nicked at the end. Dentition pleurodont; teeth numerous, small, 
with long cylindrical shafts, hollowed out at the base. Palate 
toothless. Postorbital and frontosquamosal arches bony; supra- 
