fertilisation of the Teredo, ii. [363];

tendency to similarity in the best races, ii. [241];

on his "tourbillon vital," ii. [61];

on the independent existence of the sexual elements, ii. [360].

Quercus cerris, i. 363.

Quercus robur and pedunculata, hybrids of, ii. [130].

Quince, pears grafted on the, ii. [259].

Rabbits, domestic, their origin, i. 103-105;

of Mount Sinai and Algeria, i. 105;

breeds of, i. 105-111;