AMPHIBIANS AND REPTILES. 12 
NI 
short, broad, convex above largely, its length about 214 in its width, 
and when viewed above with end but slightly narrowed con- 
vexly, though sides sloping gradually and evenly convexly back. 
Eye large, elongate, slightly elevated over upper profile, placed 
a little nearer tip of snout than shoulder or but a trifle behind 
middle in gape of mouth. Mouth large, gape nearly straight 
or but slightly undulated in profile. Lips fleshy and firm, upper 
Bull Frog. Rana catesbeiana Shaw. 
better developed, and closing over lower all way around. Lower 
lips more firm than upper with fleshy process at symphysis fitting 
in above. When viewed below mouth seen more broadly con- 
vex, though slightly more constricted than edge of upper pro- 
file, which protrudes well in front. Teeth small, conic, pointed, 
even, uniserial and better developed anteriorly, in upper jaw. 
