Degree of Injury and Rate of Regeneration 541 
TABLE 11 
Palemonetes vulgaris. Nos 1806-1861. Specific amounts of regeneration of the chele arranged in 
order of magnitude 
| | 
SPREE TRE toon CHELA RIGHT CHELA 
REMOVED | REMOVED 
Left Right Left | Right 
| —s 
0.18 0.16 0.17 0.13 
0.18 0. 18f 0.17 0.14f 
0.19 0.19 0.17f 0.20 
0.22 0.22 0.22 0.207 
0.20 0.22 0.227 
0.21 0.227 | 
0.23 0.23 0.23 
0.24 0.23 
0.24 0.237 24 
0.25 0.26 0.27 
0.25 0.27 0.27 0.27 
0.26 0.28 0.28f 
0.29 0.29 
0.28 0.30 0.30 
0.32 0.327 0.327 
0.39 0.39 
0.41 0.40f 0.427 
0.48 0.48f 
0.53 0.577 
Av..0.282 0.286 0.239 0.230 
ft = cases that moulted after the operation. 
The individuals used were crabs of an undetermined species and 
others of Porcellana platycheles. ‘They all showed asymmetry 
in the chelz. ‘The operations consisted of the removal (a) of 
the shorter chela alone, (b) the larger chela alone, and (c) both 
chelz. The operations were made on January 16, 1903, and the 
animals were killed on March 8, fifty-one days after the opera- 
tion. Several individuals did not molt. Others molted once and 
these are used in the following data. ‘Table 12 gives the data 
for the crab of undetermined species and Table 13 for Porcellana 
platycheles. 
