A Sport of the Silk-Worm, Bombyx Mori L., and its Hereditary Behavior. 183 
No of egg- Number of black 
== Number of red worms Total 
batches 1) worms 
8 54 (24.1 %) 170 224 
II 79 (23-93 %): 251 330 
14*) 2 401 403 
15 90 (24.45 %) 278 368 
16 98 (24.62 %) 300 398 
19 66 (22.93 %) 309 375 
20 82 (27.51 %) 216 298 
23 78 (22.28 %) 282 350 
Fe) 18 225 243 
27 26 (20%) 104 130 
29 65 (32-27 %) 137 202 
33 27 (16.16 %) 140 167 
39 43 (25.14%) 128 171 
41 83 (22.49%) 285 369 
46 44 (11 42 %) 341 385 
Total?) 1,242 (22 78 %) 4,214 5,456 
Expected 
number from 
Mendelian theory 1,364 4,092 5,456 
Table s. 
Number of red and black worms in each mating of parentage No. 26. 
No. of egg- Number of black 
Number of red worms Total 
batches worms 
9 54 (20.45 %) 210 264 
10 67 (24.10 %) 210 ZU 
Total ı21 (22.36 %) 420 541 
Mendelian 
Expectation 135 406 541 
Discrepancy —14 +14 
From the results of these two generations, ı think, it is sufficiently 
clear that the „black worm“ is dominant over the ‚red‘ and that the 
segregation of both characters in the offspring follows Mendel’s law 
of heredity. 
It is important to notice, however, that sometimes there occurred 
an incomplete segregation of the two characters. In Nos. 14, 25 
1) Each batch of eggs represents the total of the eggs laid by a pairing. 
2) Excluding those marked with an asterisk. 
