CHECKLIST OF REPTILES OF ME'XICO 39 



Chiroles canaliculatus, Merrem, Tentamen systematis amphibiorum, 1820, p. 

 161. — BocouRT, Mission scientifique au Mexique . . ., fitudes sur les reptiles, 

 livr. 7, 1881, pp. 487-488, pi. 2lC, figs. 8, 8a-c.— Boulenger, Catalogue of 

 the lizards in the British Museum, vol. 2, 1885, p. 432. 



Lacerta lumbricoides Shaw, Naturalists' Miscellany, vol. 6, 1795, pi. and text No. 

 212 (type locality, Mexico, here restricted to Mexcala, Guerrero; type origi- 

 nally in British Museum), 



Lacerta mexicana Donndorff, Zool. Beitrage zur 13. Ausg. Linneschen Natur- 

 system, vol. 3, 1798, p. 135 (here restricted to Mexcala, Guerrero). 



Chalcides sulcata Suckow, Anfangsgriinde der theoret. und angewandten Natur- 

 geschichte der Thiere, vol. 3, 1798, p. 147 (here restricted to Mexcala, 

 Guerrero) . 



Chamaesaura propus Schneider, Historia amphibiorum naturalis et literaria, 

 fasc. 2, 1801, p. 211 (here restricted to Mexcala, Guerrero). 



Type, — Not known. 



Type locality. — IMexico, here restricted to Mexcala, Guerrero. 

 Range. — Kno^vn in the basin of Rio Balsas, Guerrero. Reported 

 from Mexcala, Tecuaiziapan, and Balsas. ^^ 



Suborder Sauria Macartney 



Sauria Macartney, in Ross's translation Cuvier's Lecons d'anatomie compar^e, 

 vol. 1, 1802, table 3. 



Families. — Nineteen, of which 10 occur in Mexico. 



KEY TO MEXICAN FAMILIES OF SAURIA 



1 . Neither forelegs nor hind legs evident externally 2 



Both forelegs and hind legs visible externally 3 



2. No eye opening; eye scarcely or not visible below lateral head scales; one 



unpaired median scale between frontal and rostral. Anelytropsidae (p. 170) 



Eye opening present, although small; a pair of scales on dorsal surface of head 



between frontal and rostral Anniellidae (p. 208) 



3. No movable eyelids; eyes permanently open 4 



Eyelids present, movable 6 



4. All scales around middle of body uniform, flat, cycloid, smooth, in about 13 



rows Teiidae 20 (p. 170) 



Not so 5 



5. Head covered with large, flat plates; ventral scales large, quadrangular, 



abruptly differentiated from granular lateral scales. .Xantusiidae (p. 151) 

 Dorsal surface of head covered with granular scales; ventral scales smaller, 

 rounded, not abruptly differentiated from granular lateral scales. 



Gekkonidae (p. 40) 



6. All scales around middle of body perfectly smooth (sometimes finely striated), 



cycloid, more or less equal in size (those in the middorsal row or pair or 



rows may be widened) 7 



Not so__ 8 



7. Only one scale in contact with frontal anteriorly; five supraoculars. 



Angxiidae 21 (p. 194) 



i« A record for "Morelia?," Michoacdn (DugSs, La Naturaleza, ser. 2, vol. 2, 1896, p. 480), is unacceptable 

 until verified. 

 "> Oymnophthaimus only. 

 " Diploglossui only. 



