259 



The relation of the fifth toe to the length of the third toe gave a very jagged 

 curve with the length of the fifth toe .95 of the length of the third as the condi- 

 tion occurring in .20 of the specimens. From this a very irregular curve extends 

 to .89 on one side and to 1.00 on the other. 



The relation of the diameter of the tympanum to the diameter of the eye 

 gave the most irregular curve. Thirty-five per cent, of all the specimens had a 

 tympanum with a diameter equal to .60 of that of the eye. From this we have 

 a saw-toothed curve to .48 on one side and .70 on the other. A comparatively 

 large per cent. — 15 per cent. — have a relation of .50. Attempts to get system 

 out of this curve'by breaking it up into age curves did not succeed entirely. But 

 these separate curves for the different ages show that in the young the tympanum 

 is comparatively small, and that the peak noted at the .50 mark is due to the- 

 young included in the general curve. 



The whole study emphasized the fact that there is little or no coordination in 

 the variation in this frog. Xo two characters, in fact, seem to vary together and 

 all the specimens may be referred to but one variety. 



I have in the following grouping, in the shape of the conventional key, sep- 

 arated the specimens according to their color patterns. All but one or two of 

 the combination of patterns contains individuals which have the vomerine patches 

 of teeth forming a straight line, and others with these patches inclined to each 

 other at a more or less distinct angle. They clearly show that there is no coordi- 

 nation in the different parts of the color pattern. Each region varies apparently 

 independently of the others. 



KEY TO THE COLOR PATTERNS. 



a. A spot on the nose. 

 b. Two complete series of spots on the back. 

 c. Two cross bars on the femur. 

 d. Tibia with a mixture of spots and bars. 5 specimens. 

 bb. Two complete series of spots on the back, with a third broken series 

 between. 

 e. Two cross bars on the femur. 

 /. Tibia, with a mixture of spots and bars. 16 specimens. 

 ff. Tibia, with a row of spots on the anterior and another on the 

 posterior edge, upper surface unspotted. 1 specimen. 

 ee. Three cross bars on the femur. 



g. Tibia, with a mixture of spots and bars. 



h. Spots on back, many and small. 21 specimens. 

 hh. Spots on back, few and large. 13 specimens. 



