554 Charles Zeleny 
TABLE 28 
Cambarus propinquus. Nos. 2391-2483. One chela removed one day after the third molt 
| ; | 
| LENGTH OF REGEN- | 
CATALOGUE NUMBER | DAYS OF REGENERATION) 
| ERATED RIGHT CHELA | 
2402 18 1.67 
2406 19 2.90 
2409 18 1.64 
2412 | 16 1.70 | Rate of regeneration per day 
2415 | 18 1.61 =.115 mm. 
2421 18 Dear 
2435 17 2.13 | 
2477 17 2.20 | 
Averagetc ac. os.=c - 17.6 2.03 | 
a | | 
TABLE 29 
Cambarus propinquus. Nos. 2391-2483. Both chela removed one day after the third molt 
ee 
DAYS OF LENGTH OF LENGTH OF 
CATALOGUE 
OES REGENER- | REGENERATED REGENERATED 
ATION LEFT CHELA | RIGHT CHELA 
2400 19 1.48 1.55 
2410 18 1.82 | 1.82 | 
2aag | 17 Lae tacaaate Sy) ae Cea | 
2426 | 19 | 1.82 L652 Rate of regeneration per day: 
2428 | 18 2343 2.43 Leftchela  =.115 mm. 
2437 | 19 3.10 3.10 Right chela =.113 mm. 
2451 | 17 2.35 2.28 
2459 18 2.25 212, 
2470s 18 2.13 2.16 
Average..... 18.1 2.09 2.05 | 
The average regenerated lengths are slightly greater in each 
of the two regenerated chele of a double removal than in the 
one chela of a single removal. ‘The amounts are 2.09 mm. and 
2.05 mm. for the double removal and 2.03 for the single removal. 
The rate per day is the same for one of the two chelz of a double 
removal as for the single chela of a single removal. The other 
