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The brilliant algae covering the moving stream that carries the hot water from the source to the hot pools
The rippled texture are bubbles due to gas rising to the surface but being unable to penetrate the layered matte of algae. There were many frogs or toads and snails and insects, but all of them too fast for me.
Fig. 21.—A, C, successive stages in the development of the sexual organs of a green felt (Vaucheria). an. antheridium. og. oögonium. D, a ripe oögonium. E, the same after it has opened. o, the egg cell. F, a ripe spore. G, a species in which the sexual organs are borne separately on the main filament. A, F, × 150. G, × 50. cl. chloroplasts. ol. oil.