. Bulletin. Geography. Fig. 12.—A sun animalcule (Aclinophrys sol Ehrbg.); 330 times natural size (after Leidy). Fig. 13.—Protozoan {Peridinium tabidatum Ehrbg.); 400 times natural size (after Kent). Fig. 14.—A shelled protozoan {Difflugia glohu- losa Duj.); 130 times natural size (after Leidy). It deserves comment also because of its scientific interest, and the aes- thetic value of the vari- ous forms of which it is composed. a) Its composition (85, 86, 87, 88, 89).—The minutest animals of this formation are the protozoa. About thirteen species have been found to inhabit the open waters of t
. Bulletin. Geography. Fig. 12.—A sun animalcule (Aclinophrys sol Ehrbg.); 330 times natural size (after Leidy). Fig. 13.—Protozoan {Peridinium tabidatum Ehrbg.); 400 times natural size (after Kent). Fig. 14.—A shelled protozoan {Difflugia glohu- losa Duj.); 130 times natural size (after Leidy). It deserves comment also because of its scientific interest, and the aes- thetic value of the vari- ous forms of which it is composed. a) Its composition (85, 86, 87, 88, 89).—The minutest animals of this formation are the protozoa. About thirteen species have been found to inhabit the open waters of the lake. Of these the sun animalcule (Actinophrys sol) (Fig. 12) and the shelled protozoan {Difflugia- globu- losa) (Fig. 14) are easiest to recognize. Nine of the thirteen common species are mixotrophic in their nutrition (, contain chlorophyll and manufacture their own food) (Fig. 13) and share with the algae and diatoms the important function of furnishing food for the rotifers (wheel animalcules) and the 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 Geographic Society of Chicago. Chicago, Ill. : Published for the Society by the University of Chicago Press
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeography, bookyear19
