Cambarus bartoni. 
Degree of Injury and Rate of Regeneration 
549 
CATA- 
TIME IN- 
LOGUE 
MOLTS | TERVALS 
NUM- 
IN DAYS 
BER 
2237 8-9 22 
2245 8-9 26 
2253 8-9 30 
|. 
ENE Tort ES foal =a | 26 
i 
*Chela deformed. 
& 
Dp % 
o a 
o A 
a =| MOLTs 
é i) 
a 2 
<) 
2218 | 8-g-10 
2219 | 8-g-10 
2223 8-9-10 
2227 | 8-g-10 
2248 8-9-10 
2252 | 8-g-10 
2259 | 8-g-10 
2262 | 8-g-10 
2242 | 8-g-I0 
Average .....-.- 
Cambarus bartoni. 
| TIME IN- 
IN 
DAYS 
| 
| 
| 
| TERVALS | 
Third regeneration. 
SPECIFIC 
AV OUNT 
ERATION 
0.48 
OF REGEN- 
SPECIFIC 
RATE OF 
REGEN- 
ERATION 
0.022 
0.019 
0.017 
0.0193 
TABLE 21 
Third regeneration. Both chele removed. One molt 
CEPHALO-THORACIC | LENGTHS OF REGENERATED 
LENGTH CHELAE 
Molt 8| Moltg| Left Right. | Average 
Th2 12.0 5-4 5-4 5.4 
1O}5 |e kee 5-3 < agit 
10.4 TOUS 5-4 5-4 Gee 
Oy || Ley 5-37 5-37? | 5-37 
TABLE 22 
Single chela removed, Two molts 
| AVERAGE 
CEPHALO-THORACIC LENGTH 
| CEPHALO- 
Molt 8 | 
Molt 9 
| 
| Molt 10 
| THORACIC 
TARE a 
12.3 
12.6 
12.9 | 
II 
| LENGTHS 
‘Molts 8-9 | 
10.75 
10.55 
10.9 
10.35 
| 
LENGTH 
OF REGEN-| 
ERATED 
CHELA 
0.56 
| SPECIFIC | SPECIFIC 
| aMouNT | RATE oF 
OF REGEN-| REGEN- 
| ERATION ERATION 
O14 
013 
oll 
or 
O15 
O12 
-009 
-O15 
-009 
009999900 
0.0719 
the lesser injury and 0.0193 for the greater injury. The advan- 
tage is throughout in favor of the chela that has a regenerating 
mate. 
In the two-molt cases the absolute amount of regeneration 1s 
on the average 6.07 mm. when a single chela is removed and 
6.85 mm. for the left and 6.6 mm. for the ght chela when both 
are removed. ‘The specific amount is 0.57 for the single chela 
