1 78 'Journal of Comparative Neurology and Psychology. 



appear at S^', that in the mid-position T and T^ give intermediate 

 values. This can also be seen by an examination of Fig. 3. 



TABLE 5. 



Showing the average length of the internodes on fibers of like diameter at the levels 

 S„ T and Ti in the nerves to the leg of Frog 5. Othervi^ise, this table is similar 

 to Table 4. 



In view of this result, it was thought necessary to determine 

 this same relation in other specimens. Before commenting on the 

 foregoing results, therefore, the additional observations on this 

 point will be presented. 



A large specimen, Frog 8, body weight 63 grams, total length 

 222 mm., was examined. Three locaHties on the nerves to the 

 leg, namely S^, T and T^ were selected, and more than 100 inter- 

 nodes measured at each level. The measurements were made on 

 fibers from 5/z to y.^u in diameter. These have been arranged 

 as before, in three classes, approximately 5.3/^, 6.3/1 and y.^fx in 

 diameter, and the data thus condensed, are given in Table 6. 



TABLE 6. 



Showing the average length of the internodes at the several levels in the nerves to 

 the leg of Frog 8. Body weight, 63 grams; total length, 222 mm. At each 

 level, the measurements are grouped in three classes according to diameter. The 

 numbers in parentheses indicate the number of measurements. 



