. Experimental morphology. Protoplasm; Growth. Fig. 22. — Section through the ovary of a lohster hardened with its dorsal surface (23) upper- most. The nucleoli lie against the ventral surface of the nucleus. Magnified 50 diame- ters. (From Heeeick, '95.) Fig. 23. — Section through the nucleus of a young ovum (J mm. in diameter) showing the nucleolus, which has, ap- parently, caused a distention of the nuclear membrane by the pressure of its own weight. Arrow shows the direction of the earth's centre. Magnified 248 diameters. (From Hbr- EICK, '95.) the moment of killing (Fig. 22). The weight o
. Experimental morphology. Protoplasm; Growth. Fig. 22. — Section through the ovary of a lohster hardened with its dorsal surface (23) upper- most. The nucleoli lie against the ventral surface of the nucleus. Magnified 50 diame- ters. (From Heeeick, '95.) Fig. 23. — Section through the nucleus of a young ovum (J mm. in diameter) showing the nucleolus, which has, ap- parently, caused a distention of the nuclear membrane by the pressure of its own weight. Arrow shows the direction of the earth's centre. Magnified 248 diameters. (From Hbr- EICK, '95.) the moment of killing (Fig. 22). The weight of the nucleolus is relatively so great as sometimes to cause a depression in the part of the nuclear membrane upon which it rests (Fig. 23). § 3. CONTEOL OF THE DiEECTION OP LOCOMOTION BY GeAVITY — GrBOTAXIS * The control of the movements of Protista has been investi- gated chiefly by four naturalists : Schwaez ('84), who studied .Euglena and Chlamidomonas; Adbehold ('88), who studied * So called by Schwarz ('84, p. 71).. 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 Davenport, Charles Benedict, 1866-1944. New York, The Macmillan company; London, Macmillan & co. , ltd.
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