General Discussion 



59 



Or if each species be considered from the point of view of least and greatest 

 transformation sizes, least breeding size and greatest breeding size, how many 

 times bigger will a little transformed anuran of each species have to grow to 

 attain least breeding size and greatest breeding size: (Table 20) 



RATE OF GROWTH 



(PI. XVII) 



Knowing the transformation size and average, mode and maximum adult 

 size we have certain starting points. But our conclusions on the number of 

 years of growth are based on presumptive evidence, namely on the meas- 

 urements of frogs taken at the same time or place, e.g. if at one time and place 

 we take a 14 mm. transformed frog, a 22 mm. frog, a 31 mm. frog, and a 40 

 mm. individual of Hyla femoralis, we might infer we had four age groups: 

 14 at transformation, 22, one year old, 31, two year old, and 40, three year old. 

 But what the resident naturalists can do is to mark frogs or keep them in 

 some pond inclosure and get the real growth of an individual or individuals. 

 My notes are to stimulate work along this line, little having been done in 

 this country. 



Of course great variations might happened with some northern species 

 which might have extended periods of breeding, such as Bufo americanus, 

 Scaphiopus holbrookii or Rana clamitans, but in the south or southwest it 

 becomes more complicated with frogs which may breed from February or 



