. The Biological bulletin. Biology; Zoology; Marine biology. 408 BJORN FOYN which was thereupon placed in darkness until the following day. The zoospores had by then become distributed evenly over the bottom of the dish and had affixed themselves to the glass. Inspection 10 days later found the bottom over-grown by various types of germ plants. A precise count was taken within a circle-shaped area of cm. diameter, and the various types were at the same time separated, each plant being loosened from the under-bedding with the aid of a glass needle and transferred to a new petri dish. Altoge
. The Biological bulletin. Biology; Zoology; Marine biology. 408 BJORN FOYN which was thereupon placed in darkness until the following day. The zoospores had by then become distributed evenly over the bottom of the dish and had affixed themselves to the glass. Inspection 10 days later found the bottom over-grown by various types of germ plants. A precise count was taken within a circle-shaped area of cm. diameter, and the various types were at the same time separated, each plant being loosened from the under-bedding with the aid of a glass needle and transferred to a new petri dish. Altogether, within the limited area 728 germ plants were found. Of these, 189 belonged to the wild-. 1 mm Figure 2. Ulva mutabilis. Twelve-day-old sporophytes from a cross between a div SI gametophyte and a gametophyte of the wild-type. type and 138 to the Slender-type. The remaining 401 consisted for the greater part of germ plants of the same appearance as in Figure la and thus resembled the pristine mutant plant completely. A smaller number were more simple, built more dumpily, and were only weakly ramified (Fig. 3a). Every transition between the two types was found, however, and an assortment into two distinct groups had, therefore, to be abandoned. All of them were reckoned as belonging to the mutant type. Thirty-six germ plants could not be identified; they were, partly, of different shape and dissimilar to the types hitherto known. The plants. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
