44 NORTH AMERICAN BATRAOHIA AND REPTILIA. 



over fifth labial; color above yellowish or brownish, with darker 

 dorsal blotches, 20 to 30 from head to anus; sides more or less 

 mottled with dark blotches; occasionally uniform black above; 

 dorsal rows 23-25; all, or all but two or three outer rows strongly 

 keeled; G. 125-150. Austroriparian or Eastern regions. 



78. JI. plaiyrAimis, subsi:>. atmodes, (B. and G.)CoY)e. Ros- 

 tral obtuse, but little prominent; scales on back of head obsoletely 

 carinate; center of eye over fourth labial; color above pitch-black, 

 with 25 light yellow transverse dorsal bands (sometimes nearly 

 obsolete); sides mottled with black and yellowish; beneath 

 yellowish, blotched with black; young specimens somewhat 

 lighter; dorsal rows 23; the scales with short keels, the outer 

 rows obsoletely carinate; G. 130-145. North Carolina to 

 Georgia. 



J^. Azygos encircled by from live to ten small plates. 



79. H. simus, subsp. simus, (Linn.) Cope. Hog-nosed 

 Snake. Vertical as broad as long; upper labials high, seven to 

 eight; ground color above liglit brownish-yellow, with a dorsal 

 series of about 35 transverse black blotches; on sides from one 

 to three smaller series; beneath yellowish, obscurely maculate; 

 dorsal rows 25, outer ones smooth; G. 115-135. Austroriparian 

 region, except Texas; Illinois and Wiscoiisin. 



Order LACEKTILIA. 



Synopsis of Families. 



A. Yertebras procoelian ; parietal bone single. 

 a. Pterygoid in close contact with sphenoid. 



Teeth simple, conical, and pointed, attached to the inner 

 side of the jaws; tongue scaly; body covered by 

 square equal shields; limbs usually absent; tail veiy 



short AmjpJdshenidce. 



h. Pterygoid not touching sphenoid. 



X. Supranasal plates not more than one pair; clavicle 

 with a dilated proximal end. 



Premaxillary single; temporal fossae not roofed; 

 xiphisternal fontanelle present; tongue squamose 

 or squamose-papillose; nostril either in aj^late or 



suture Teidm. 



Premaxillary double; temporal fossai roofed; 



