Brooks, " The LifeHistory of the Hydromedusae: a discussion of the Origin of the Medusae, and of the significance of Metagenesis," Mem.
It is worse than useless to apply drastic remedies if the main facts cf the, lifehistory of the pest are not known; e.g.
Swammerdam's Biblia naturae, issued in 1737, fifty years after its author's death, and containing observations on the structure and lifehistory of a series of insect types.
The above sketch may be regarded as descriptive of the lifehistory of a great majority of species of caddis-flies.
So in some respects is the lifehistory, with a true larval preparatory stage, unlike the parent form, and living an aquatic life, breathing dissolved air by means of a paired series of abdominal tracheal gills.
They resemble the May-flies in their " hemimetabolous " lifehistory; the young insects are markedly unlike their parents, inhabiting fresh water and breathing dissolved air, either through tracheal gills at the tip of the abdomen, or by a branching system of air-tubes on the walls of the rectum into which water is periodically admitted.
This is the lifehistory of the most complicated forms, of the so-called eu forms. In the opsis forms the uredospores are absent, the mycelium from the aecidiospores producing directly the teleutospores.
Williams, " Contributions to our Knowledge of the Lifehistory and Cytology of Fucaceae," Phil.
Yamanouchi, " The LifeHistory of Polysiphonia violacea," Botanical Gazette (vol.
The question of species in the bacteria is essentially the same as in other groups of plants; before a form can be placed in a satisfactory classificatory position its whole lifehistory must be studied, so that all the phases may be known.
The higher "warm-blooded" creatures appear to present the simplest case and in their lifehistory there seems to be a point at which we can say "that which was alive is now dead."