File:The Journal of experimental zoology (1905) (14777036161).jpg

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Identifier: journalofexperim02harr (find matches)
Title: The Journal of experimental zoology
Year: 1905 (1900s)
Authors: Harrison, Ross G. (Ross Granville), 1870-1959 Brooks, William Keith, 1848-1908 Wistar Institute of Anatomy and Biology American Society of Zoologists
Subjects: Zoology
Publisher: (New York, etc.) Wiley-Liss (etc.)
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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ls (muscle, mesenchyme and caudalendoderm) are entirely lacking, (c/. Figs. 6 and 48.) Figs. 49-51. Three views of one and the same anterior half embryo of about the 250-cell stage;spurted in the 4-celI stage and fixed z hours later. Fig. 49. Dorsal view, superficial focus, showingthe neural plate. Fig. 50. Dorsal view, deeper focus, showing two rows of chorda cells besides severalectoderm and endoderm cells. Fig. 51. Dorsal view, still deeper focus, showing the cells of theventral ectoderm. Fig. 52. Anterior half embryo, dorsal view. Spurted in the 4-cell stage, fixed 22 hours later.The yellow crescent is plainly visible in the injured cells. Sense spots are present but the neural platenever forms a tube. The chorda cells lie in a heap at the left side. There is no trace of muscle sub-tance or of a tail in this anterior half embryo. This embryo is from the same experiment as Figs.57-40; normal larva? of this stage are undergoing metamorphosis. Mosaic Development in Ascidian Eggs. 177
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