. The life of inland waters; an elementary text book of fresh-water biology for American students. Freshwater biology. 124 Aquatic Organisms meshed species the inner cells can be seen to meet by threes about the openings, quite as in the water net; but the cells are less elongate and the openings smaller. Five of the seven specimens shown in the figure lack these openings altogether. New colonies are formed within single cells, as in Hydrodictyon. In our figure certain specimens show marginal cells containing developing colonies. One shows an empty cell wall from whence a new colony has escape
. The life of inland waters; an elementary text book of fresh-water biology for American students. Freshwater biology. 124 Aquatic Organisms meshed species the inner cells can be seen to meet by threes about the openings, quite as in the water net; but the cells are less elongate and the openings smaller. Five of the seven specimens shown in the figure lack these openings altogether. New colonies are formed within single cells, as in Hydrodictyon. In our figure certain specimens show marginal cells containing developing colonies. One shows an empty cell wall from whence a new colony has escaped. Other green algce— We have now men- tioned a few of the more strongly marked groups of the green algae. There are other forms, so numerous we may not even name them here, many of which are common and widely dispersed. We shall have space to mention only a few of the more im- portant among them, and we trust that the accompanying figures will aid in their recognition. Numerous and varied as they are, we will dismiss them from further consideration under a few arbitrary form types. I. Simple filamentous forms. Of such sort are Ulothrix, (Edogonium, Conferva, etc., (fig. 45). Ulo- thrix is common in sunny rivvilets and pools, especially in early spring, where its slender filaments form masses. Fig. 45. Filamentous Green Algae. , Vlothrix; b, (Edogonium, showing characteristic annulate appearance at upper end of cell; c, (J^ribonema) Conferva; d, Draparnaldia. (After West).. 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 Needham, James G. (James George), 1868-1956; Lloyd, John Thomas, 1884- joint author. Ithaca,N. Y. , The Comstock Publishing Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1915
