Life in its lower, intermediate, and higher forms:

Acineta animal animalcules Annelida appearance beautiful becomes Beetle beneath bird bivalve bladder body Brittle-star Butterfly calcareous called Caterpillar cavity cells CHAPTER cilia cilium claws close coloured common composed Crabs creatures Crustacea curious Cydippe Cysticercus deposited disk distinct Echinodermata edge eggs elegant embryo extremity feet fibres fishes fluid furnished gelatinous gelatinous flesh gemmules genus habits head horny Hydra inch Infusoria Insects instinct integument intestinal jaws jointed larva length limbs living Medusae membrane microscope minute motion mouth muscles muscular naturalists nest observed organs orifice oval pair peculiar perfect pieces placed plates polype present prey projecting Quadrupeds rays resembling Rotifera round rows seen segments shell side singular skeleton skin slender soft species specimen Spider spines Sponge stalk Star-fish stem stomach structure substance suckers surface swimming teeth tentacles threads tiny tion transparent tube vesicle Vorticella whole wings worms