Statistical analyses 



In the following graphs, six critical measurements expressed in 

 percentages of the total length are compared. These graphs follow 

 the plan suggested by Lee R. Dice and H, J. Laaras (Contr. Lab. 

 Vert. Gen., Univ. Michigan, No. 3, 1936, pp. 1-3, 1 fig.). 



The horizontal lines represent ranges in each species and the vertical 

 bars, the means. Solid blocks extend beyond the mean for a distance 

 of twice the standard error of the mean. If the block for one species 

 does not overlap the block for another species, there is a significant 

 difference between these species in that particular character. 



The number following the species name on each graph is the number 

 of individuals on which measurements were made. When only a 

 single specimen of a species is known, the actual measurement in 

 percentage of the total length is shown by the vertical bar. 



Statistical analyses are given for the following genera and generic 

 groups on the pages indicated: 



Bufo 374 Crossodactylus 380 



Hyla faber group 375 Cycloramphus 381 



Hyla alboprmctata group 376 Eleutherodactylus 382 



Hyla minuta group 377 ^^^.^ 3g3 



Hyla rubra group 378 



Hyla albomarginata group 379 ^upsophus 383 



Phyllomedusa 379 Leptodadylus 384 



Ceratophrys 380 Physalaemus 385 



373 



