70 
Cc. J. HERRICK AND C. E. COGHILL 
Figs.5 and6 Diagrams illustrating the contractions of the myotomes, result- 
ing from the application of an external stimulus at S (fig. 5), in the first and second 
phases of the swimming reflex of an Amblystoma larva of the same age shown in 
figure 4. After the researches of Coghill (’09, 713, ’14). The myotomes involved 
