osteology of, i. 162-167;
correlation of growth in, i. 167-171, ii. [321];
young of some varieties naked when hatched, i. 170, ii. [332];
effects of disuse in, i. 172-177;
settling and roosting in trees, i. 181;
floating in the Nile to drink, i. 181;
Dovecot, i. 185-186;
arguments for unity of origin of, i. 188-204;
feral in various places, i. 190, ii. [33];
unity of coloration in, i. 195-197;