General Discussion 



45 



h. Median space in second labial row 2-4 

 times the length of either lateral part; 

 third row of lower labial teeth .33-. 66 

 shorter than the first or second rows, 

 usually at least .50; eye nearer the snout 

 than spiracle or equidistant ; nostril nearer 

 eye than tip of snout; depth of tail in 

 length of tail 2 . 3-3 . 2, average 2.7; spi- 

 racle 1. 5- 1. 8 nearer eye than snout, 

 average 1.63. Hudson Bay to Louisiana 

 and Eastern States .... Rana palustris. 

 hh. Median space .5-1.0 or i. 0-1.5 times 

 either lateral part of the second upper row; 

 third row of labial teeth .22 or .285-. 33 

 shorter than the first lower row; depth of 

 tail in length of tail 2 . 0-2 . 8 or 2 . 7-3 . 4. 

 i . Median space of second upper row . 5- 

 i.o times either lateral part; third 

 lower row of teeth .285-. 33 shorter 

 than the first lower row; nostril to snout 

 equal to nostril to eye; eye 1. 15- 1.3 

 nearer tip of snout than spiracle, aver- 

 age 1.2; body length in tail length 

 1. 3 5-1. 66, average 1.5; mouth .9- 

 1 . 6 larger than internasal space ; depth 

 of tail in length of tail 2 . 0-2 .88, aver- 

 age 2.65; tail crest usually with quite 

 prominent dark spots; greatest length 

 of tadpole 74 mm; spiracle 1.1-1.86 

 nearer eye than snout, average i . 46. 

 Southeastern States to Louisiana . . 



Rana sphenocephala. 



ii. Median space i. 0-1.5 times either 

 lateral part ; third lower row . 2 2 short- 

 er than the first lower row; nostril i . i- 

 1 . 5 nearer the eye than snout ; eye 

 nearer spiracle than snout 1.1-1.3; 

 body length in tail length i . 3-2 . o, 

 average 1.7; mouth larger than inter- 

 nasal space; depth of tail in length of 

 tail 2.7-3.4, average 3.0; tail crest 

 usually translucent with fine spots or 

 pencillings; greatest length of tadpole 

 84 mm; spiracle 1.4- 1.8 6 nearer eye 

 than snout, average i . 59. North 



