"Natas," or Niatas, a South American breed of cattle, i. 89-91.
Nathusius, H. von, on the pigs of the Swiss lake-dwellings, i. 68;
on the races of pigs, i. 65-68;
convergence of character in highly-bred pigs, i. 73, ii. [241];
causes of changes in the form of the pig's skull, i. 72-73;
changes in breeds of pigs by crossing, i. 78;
change of form in the pig, ii. [279];
effects of disuse of parts in the pig, ii. [299];
period of gestation in the pig, i. 74;
appendages to the jaw in pigs, i. 76;