A Sport of the Silk-Worm, Bombyx Mori L., and its Hereditary Behavior. I8I 
Table 2. 
Kind of worms hatched from each batch x 
No. of egg- Total number of 
batches Bele onine Rediworms worms hatched 
I 356 . 100 (21%) 456 
2 383 108 (21.99 %) 491 
3 353 80 (18.47) 433 
4 358 92 (20.66 %) 450 
5 329 85 (20.53 9 is 414 
6 268 95 (20.66 %, ) 363 
7 285 109 (27.66 %) 394 
3 346 103 (22.93 2) 449 
9 296 85 (22.36 %) 380 
10 311 107 (25.59 % . 418 
II 314 IOI (24.33 %) 415 
12 267 87 (24.57 %) 354 
13 225 63 (21.87 %) 288 
14 265 68 (20.42 %) 333 
I5 241 79 (24.37 % 320 
16 217 73 (25-17 %) 290 
17 240 73 (23.32 %) 313 
18 329 Z (18.74 %) 405 
19 327 7 (22.87 %) 424 
20 205 ae (21.45 %) 261 
21 346 102 (22.76 %) 448 
22 237 58 (19.66 %) 295 
3 Both red and black worms were produced, but the number was 
not recorded. 
27 
25 315 | 94 (22.98 %) 409 
26 350 112 (24.24 %) 462 
Total 7,162 2,103 (22.69 %) 9,265 
Expected 
Mendelian figures' 6,948 2,316 
These figures immediately suggested that we had to do with the 
phenomena of Mendelism, with the black worm dominant over the red. 
The offspring from other matings which yielded simply black 
worms remained true to the parents in the subsequent generations and 
never once produced any red worms, as far as my experiments went. 
The third generation (F,). 
Both red and black worms found in each mating of the second 
generation were reared separately. The mounting took place on the 
ı6th—ı8th July and the moths emerged between 29th July and 
2nd August 1906. 
12” 
