General Discussion 



19 



old age maximum frogs might not be comparable. In the same way if one 

 glance at sizes from 11-20 mm. to 82 mm. one will find at any one size differ- 

 ences in maturity. Nevertheless keys at each size might prove useful and 

 might in spite of their limitations prove suggestive of better characters than 

 those we have chosen more at random in the past. In this connection, how- 

 ever, the keys of the past have not been so bad because they have generally 

 chosen breeding adults. Possibly they will prove as good as some suggested 

 by this identification index. (Table 2) 



We have sought to measure the Salientia (frogs, toads, tree-frogs, etc.) 

 of the United States and Canada at the 13 sizes given under the foregoing 

 topic (see Measurements). Our intention was to present in this paper a 

 series of keys at these various measurements. This will be delayed until 

 the missing sizes can be found. Any student of the frogs of the Southeastern 

 United States may find the following tables at 28 mm. (Tables 3, 4), 44 mm. 

 (Table 6), 66 mm. (Table 7), 82 mm., 95 mm. (Table 8), 113 mm., 125 mm. 

 (Table 5), and 150 mm. (Table 9) of use and they are included though our 

 studies of these measurements and growth are not completed. 



Table 3 



£ M) 



