instincts of, [91]-93;

gill slits of, [332] and following.

Children, [24];

growth of, [56]-58, [61]-64;

best plays for, [58]-60;

grip of very young, [75]-76, [84];

swallowing of, [77];

instincts of, [78]-85, [93]-94;

compared with animals, [112]-114.

Cold, and heat, sense of, [169]-170;