500° Charles Zeleny 
TABLE 13—PatarMoNn TENUICORNIS 
Successive regeneration of the chele 
| | | SPECIFIC 
ages ORIGINAL | FiRSTREGEN-| SECOND _ THIRD REGEN=| FINAL THOR-| AMOUNT OF 
LOGUE LENGTH CHELA 2 .cioN | REGENERATION ERATION “acic LENGTH | LAST REGEN- 
NUMBER | PROPODITE | | ERATION 
1429 2.22* 1.81 
1432 2 2.40 2.31 2.01 GES 0.296 
1434 | 2.41 1.88 2.02 | 1.89 | 
1436 2.38 2.01 1.96* | | 
1439 2.85 133 2.81 | | 8.0 0.351 
1440 2.60 2.44 | | 
1441 | 2.78* | 2.62 | 2.52 | 7-4 0.341 
1442 | 2.96 2.74 | 56 | 2.39 7-6 | 0.314 
1443 2.96** 2573 | 
1444 | 3-30 2.96 | | 
1445 |  3-78F 3) | 3.44 3-63 | 9.7 | 0.374 
1446 | feegcG 7 wall 7ese55 3-46 | 
000/57 7 OI Wn OG 3 .80* | 
1448 4-07 3-70 | | | | 
1449 4.10%. 4) 363 | 3.46 | 10.6 0.326 
1450 | = 3-73 hee Sg 3.19 | gone II.0 0.284 
1451 5.07 li, (£0 4.20 11.8 0.356 
1452 | | 5.55% 5.08 ee 13-1 0.382 
amounts of regeneration following successive removals. Because 
of the small number of individuals in the final comparison and 
because of the large amount of variation, it is not possible to deter- 
mine the relation between the size of the individual and its amount 
of regeneration. ‘The specific amounts of regeneration show no 
close relation between size or age and specific amount of regenera- 
tion. ‘The molting data (Table 14) show on the average a decrease 
in length of the molting period during the time covered by the 
experiment, though the exact amountof its influence in the present 
case is hard to estimate. In Table 14 the two periods followed by 
a dagger ({) are ones in which the operation was made on the day 
after capture of the animals, the time of the previous molt being 
unknown. They should not strictly be included in the comparison 
because it is known that the effect of an operation upon the length 
of a molting period varies with the time of the operation in relation 
