46 Frogs of the Okefinokee Swamp 



America east of Sierra Nevada south- 

 ward into Mexico . . Rana pipiens. 

 ff. Tadpoles 84 to 142 mm; tadpoles usually winter 

 over at least one season; transformation sizes 28 to 

 59 mm. (except R. virgatipes 25 to 35 mm., possibly 

 R. onca) ; tadpoles usually with strongly pigmented 

 bellies, viscera not plainly showing through the skin 

 (in spirit specimens). 



g . Tadpole with prominent continuous black crest 

 margins and a black musculature band; belly 

 bluish; tadpoles to 95 mm.; young tadpoles 

 black with transverse yellowish band on the 

 body; spiracle .86-1.2 nearer vent or base of 

 hind legs than snout, average i . o; spiracle . 85- 

 1 . 2 nearer eye than base of hind legs or vent, 

 i. e., usually equidistant; eye equidistant from 

 spiracle and tip of snout ; muciferous crypts very 

 distinct; spiracle below lateral axis; tail tip 

 acuminate; second upper labial row in upper 

 fringe 1/3 to 1/4; upper fringe distinctly 

 greater than horny beak ; median space between 

 two parts of second upper labial row i-i 1/2 

 of either lateral part; third labial row equal to 

 horny beak; third lower labial row longer than 

 single row of lower papillae; third lower labial 

 row 1/4 to 1/5 shorter than ist lower row. Eggs 

 unknown. South Carolina — Mississippi . . . 



Rana heckscheri 



gg. Tadpole without black crest margins or lateral 



band; belly white, cartridge buff or yellow to 



maize yellow; no transverse yellow band in 



young tadpoles ; spiracle nearer vent than snout 



1. 1 -1. 8; spiracle to eye rarely less than 1.25 



greater than spiracle to vent; eye nearer tip of 



snout than spiracle i .-i . 4; second upper labial 



row in upper fringe 1/4 to 1/15; upper fringe 



equal to or slightly greater than horny beak; 



median space in either lateral part i 1/2 to 11 ; 



third lower labial row much less (about i 1/2) 



than horny beak; third lower row much shorter 



or equal to single row of lower labial papillae. 



h. Tadpoles to 140 mm; eye well above 



lateral axis; muciferous crypts indistinct; 



spiracle just below lateral axis; spiracle 



1 . 06-1 . 44 nearer base of hind legs or vent 



than tip of snout, average i .25; depth of 



