. A laboratory guide for beginners in zoology. Laboratory animals. The Paramecium ; A, normal active form; B, after treatment with acetic acid to bring out trichocyst threads; C, conjugating specimens; £>, early stage of fission. 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 Weed, Clarence Moores, 1864-1947; Crossman, Ralph Wallace, 1874- joint author. Boston, D. C. Heath & Co.

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Keywords: ., bookauthorweedclar, bookcentury1900, bookdecade1900, bookyear1902