The Natural Conditions of Existence as They Affect Animal Life

Amphibia animals Annelida Axolotl Babelthuap barrier-reef birds body branchial cavity Branchipus carbonic acid causes cells certainly channel characters Cheaper Edition chlorophyll chromatophores colour conditions of existence coral crab creatures Crustaceans currents Darwin Demy 8vo direct distribution effects eggs experiments external extremely eyes fact fauna Fcap fishes fresh water fresh-water frog function genera genus gills growth Hence hitherto Illustrations individuals influence Infusoria insects instance investigation islands known Kriangle land Large crown 8vo larvæ layer light Limnæa lungs marine mode mollusca monophagous nature Neritina Note observations occur Onchidium operculum optimum organs origin oxygen parasites peculiar Pelelew Pelew Pelew Islands perfectly Philippines physiological pigment plants polyphagous polyps proved reef regard resemblance respiration result salt Second Edition selection shell skin Small crown 8vo snails species sponge spots structure subsidence surface temperature theory Third Edition tion tropical true univalves variations various Vertebrata vols worm