16 HOOKER: PHYSIOLOGICAL OBSERVATIONS 
The reaction is represented in TABLE V and Fic. 10. No move: _ 
ment was observed for an hour after stimulation. The region of 
elongation and curvature was shorter than in the second reaction. — 
TABLE V 
‘No. of ’ ‘ : ; ; : 
eee foe |e kee ae) ee 
os I 80 80 80 80 | 80 80 
g <i 2 89 90 92 92 92 92 
8 = 3 53 54 54 54 54 54 
< + 7o 79 79 79 78 4 
5 82 98 98 98 96 95 
Total 374 401 403 403 400 398 
r z 79 79 79 79 79 79 
2» 2 89 94 93 93 93 93 
& 3 3 54 53 54 54 54 54 
= 4 69 68 68 68 75 7 
5 84 84 85 85 90 93 
Total, 3.10 375 ko 498 379 379 | 30r | 396 | 
The acceleration of growth on the convex side was less than in the | 
previous reaction, and the tentacle was not fully bent for 7 hours 
and 30 minutes. It remained in this condition 2 hours and 30 
minutes before unbending again. The tentacle was again straight 
25 hours after stimulation. It measured 3.98 mm., an increase of 
0.24 mm. After this experiment the tentacle stopped secreting, 
and no further reaction could be obtained. 
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Fic. 10. A graph representing the third reaction of the same tentacle shown 
in Fic. 9; drawn according to data in TABLE V, and on the same scale as Fic. 4. 
