Zea Mays, i. 320.
Zebu, i. 79;
domestication of the, i. 82;
fertile crossing of, with European cattle, i. 83, ii. [110].
Zebra, hybrids of, with the ass and mare, ii. [42].
Zephyranthes candida, ii. [164].
Zinnia, cultivation of, ii. [261].
Zollinger on Malayan penguin ducks, i. 280.
Zoospore, division of, in Algæ, ii. [378].
"Zopf-Taube," i. 154.