. The beauties of nature and the wonders of the world we live in. Natural history; Physical geography; Astronomy. ON ANIMAL LIFE 107 dusae in all stages of development (Fig. 3), some still in the condition of minute buds, in which no trace of the definite Medusa-form can yet. Fig. 2. — Bougainvilleafruticoaa; natural size. (After AUman.) be detected; others, in which the outlines of the Medusa can be distinctly traced within the transparent ectotheque (external layer); others, again, just casting off this thin outer pellicle, and others completely freed from it, struggling with convulsive efforts to break loose from the colony, and finally launched. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Lubbock, John, Sir, 1834-1913. New York, London, Macmillan and Co.