antagonism of growth and reproduction, ii. [384];
formation of ducts in plants, ii. [300].
Spermatophores of the cephalopoda, ii. [383].
Spermatozoids, ii. [363]-[364];
apparent independence of, in insects, ii. [384].
Sphingidæ, sterility of, in captivity, ii. [157].
Spinola, on the injurious effect produced by flowering buckwheat on white pigs, ii. [337].
Spitz dog, i. 31.
Spooner, W. C., cross-breeding of sheep, i. 100, ii. [95]-[96], [120];