development of a proboscis in the pig, ibid.;
transmission and blending of characters in hybrids, ii. [94];
refusal of animals to breed in captivity, ii. [149];
on the Guinea pig, ii. [152];
silkworms producing white cocoons, ii. [199];
on the carp, ii. [236];
on Helix lactea, ii. [280];
on monstrosities, ii. [254];
injury to the embryo a cause of monstrosity, ii. [269];
alteration in the coat of horses in coal mines, ii. [278];