File:The embryology and metamorphosis of the Macroura (1891) (14796070463).jpg

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Identifier: embryologymetamo00brook (find matches)
Title: The embryology and metamorphosis of the Macroura
Year: 1891 (1890s)
Authors: Brooks, William Keith, 1848-1908 Herrick, Francis Hobart, 1858-1940 National Academy of Sciences (U.S.)
Subjects: Crustacea Crustacea
Publisher: (Washington : National Academy of Sciences : Government Printing Office
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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MEMOIRB OF THE NATIONAL ACADEMY OF SCIENCES. Plate V. Dorsal view of the adult male Stenopus hispirhis. Nassau, N. P., June, 1887. L = IJ in. L. firstantenna, exopodite—3J in., endopodite—3; in. L. second antenna = 4;i in. xlf. Excepting the brilliant pigment bands the body and appendages are nearly white»and could bebetter represented against a black background. The arching flagelia of the antennaeare greatly foreshortened, and the spines and setse are of necessity unduly empha-sized in a pen and ink drawing.
Text Appearing After Image:
CO Q E (0 ao z I- :i a: 474 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. Plate VI. Fig. I. Part of section of egg, showing the male pronncleus. The female pronucleus lies nearerthe center of the egg, is less regular in outline and has less perinuclear protoplasm.A single polar body (not represented) is seen in this section. It lies close to the sur-face of the egg, beneath the membranes, not far from the male pronucleus. It appearsas a small mass of chromatin, which stains quite as intensely as the nuclei. Eggabout 6 hours old. x 276. Fig. 2. Section of egg with four nuclei, none of which are at the surface, x 152. Fig. 3. Part of same section, showing the nucleus and surrounding protoplasm and yolk, x 276. Fig. 4. Lateral section, cutting yolk segment on a level with the disk-shaped nucleus. CompareFig. 5 a. Eight-cell stage. Age about 12 hours. x276. Fig. 5. Section through egg in eight-cell stage. Compare Fig. G. Age about 15 hours, x 152. Fig. 6. Surface view of egg in the third s

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Brooks, William Keith, 1848-1908; Herrick, Francis Hobart, 1858-1940;

National Academy of Sciences (U.S.)
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29 July 2014



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