. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. VOLUMETRIC CHANGES IN EGG OF BROOK LAMPREY. 93 Membranbildung keine mit dieser Methode wahrnehmbare Volumanderung erfahrt. Das beweist mit Sicherheit, dass der Inhalt des Membranraums hauptsachlich Seewasser ist, das vom aussen in demselben ; In some work that I have done1 on the fertilization process in the brook lamprey, Entosphenus wilderi (Gage), I have obtained. FIG. i. Unfertilized eggs of Entosphenus wilderi. results which indicate that the eggs in this form decrease consider- ably in size after ferti
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. VOLUMETRIC CHANGES IN EGG OF BROOK LAMPREY. 93 Membranbildung keine mit dieser Methode wahrnehmbare Volumanderung erfahrt. Das beweist mit Sicherheit, dass der Inhalt des Membranraums hauptsachlich Seewasser ist, das vom aussen in demselben ; In some work that I have done1 on the fertilization process in the brook lamprey, Entosphenus wilderi (Gage), I have obtained. FIG. i. Unfertilized eggs of Entosphenus wilderi. results which indicate that the eggs in this form decrease consider- ably in size after fertilization. Herfort11 has given a careful description of the egg of Petro- myzon fluviatilis and I have verified most of his observations on the egg of the American brook lamprey. Since there is no essential difference between the eggs of the two species, only a brief description is necessary here. Before fertilization the egg approaches very closely to an ellipsoid of revolution in shape although it is slightly more pointed at the animal pole (Fig. i). It 1 Presented to the Michigan Academy of Science at its nineteenth annual meeting in Ann Arbor, April 3, 1913. Fifteenth Report of the Michigan Academy of Science. 2 Herfort, Karl, Arch. /. mikr. Anat., Vol. 57, 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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