540 | Charles Zeleny 
TABLE to 
Palemonetes vulgaris. Nos. 1806-1861. Both chele removed. 
operation 
Animals killed eight days after the 
FINAL LEFT CHELA 
RIGHT CHELA 
CATALOGUE, CEPHALO- 
NUMBER THORACIC Original |Regenerated| Specific 
LENGTH length length | amount 
1806 | 8.3 | 2.48 0.79 0.32 
1809 dl 8.9 | 262, >, il) Oe on: 0.23 
ESC2 yl ciGeGe. \|) MEQ3 7 | ae76 0.39 
TBR) br 2.74 0.76 0.28 
1818 4) 11.8 3-92 0.94 0.24 
1821 10.0 3-40 | 1.41 0.41 
1824 10.4 lz ord ©.26 
1827 II.9 aio 0.62 0.18 
1830 9.8 3.06 0.65 0.21 
1833 9.2 | 2.89 0.52 0.18 
TS3Or aie Old 2.69 0.59 0.22 
LSROMe a) ze 7 3-96 0.77 0.19 
1842 | 10.0 yous dey tes 0.48 
esc citer: i) aezal |) e284 0.20 
mex || ar.6 | Beas 0.83 0.25 
1854 4 2.56 0.74 0.29 
1857 9-0 2.44 0.62 0.25 
1860 7-9 2.37 1.26 0.53 
1861 11.7 248 |) “Orns 0.24 
I MESET Se ga ollgaanoood 2 oconoponne oc | Bee rerrayeererorc| 0.282 
| Original 
length 
| 
Regener- 
ated length 
0.80 
0.59% 
0.76? 
0,80 
0.90 
1.37 
0.89 
0.56 
0.68 
0.52 
0-59 
0.77 
1.48 
0293 
0.89 
0.74 
0.66 
1.36 
0.81 
Specific 
amount 
° 
° 
° 
°° 
OO) 30 * OO" O40" OO OOO 
232 
23 
.39F 
O. 
°. 
oO. 
28 
.16- 
3° 
23 
40° 
22 
18: 
.22) 
bu Pp bY DH Bw 
Wn non dv oO 
.286 
and of the right, 0.286. When the right chela alone is removed 
(nine cases) the average is 0.239. When the left chela alone is 
removed (nine cases) the average is0.230. 
The advantage 1 is very evidently in favor of the shrimps with 
the greater injury. Though the individual data overlap, the 
difference in the average is great enough to be certainly significant. 
15 Crabs. Nos. 594-601 Sp? and 602-614, Porcellana platycheles 
In connection with experiments carried on at the Naples Zoolog- 
ical Station in 1902-1903 on the question of the reversal of 
asymmetry data were obtained on the effect of degree of injury 
