Part 40

Luminosity, 265.

Medusæ, Covered-eyed, 267.

---- Luminosity of, 265.

---- Naked-eyed, 260.

Mental Faculties in the Lower Animals, 246.

Mollusca, Foot of, 7, 18, 94.

---- Boring, 53-60, 196.

---- Burrowing, 94.

---- Eggs of, 42, 47, 150.

---- Eyes of, 9, 23.

---- Gills of, 42, 51.

---- Habits of, 14, 49, 57, 94, 142, 150.

---- Mantle of, 8, 18, 23.

---- Naked-gilled, 38-45.

---- Proboscis of, 15, 18.

---- Shell of, 11, 13, 17, 20, 51.

---- Tentacles of, 9, 39.

---- Tunicate, 305.

Nacre, 12.

Nereis, Pearly, 160.

Nut-crab, 233.

Opelet, 67, 202.

Oyster-culture, 72.

Paignton, 86.

---- Cockle, 88.

Pelican’s Foot, 16.

Perophora, 302.

Petit Tor, 32.