758 PROCEEDINGS OF THE AMERICAN ACADEMY. 



TABLE VIII. Genealogy of M Series (1903-1). 



Pair M. 



[Number of young ?] Brother X Sister 



i_ 



Generation. Average No. Young. 



1 241 313 166 204 213 



2 363 375 335 210 321 



I 



I I 



3 109 338 223 



I 



I I 



4 N 396 290 343 



5 ?^ sterile 205 205 



6 228 237 327 264 



4 



I I I 



7 9 sterile 234 313 273 



4 



I I I 



8 189 182 67 146 



i 



I I I 



9 247 265 303 272 



i 



10 262 234 9 sterile 248 



4 



I I I 



11 351 385 460 399 



12 332 315 323 



4 



I I I I 



13 454 341 281 335 352 



I 



I I 



14 335 J sterile 335 



Average for series . . . 280 



