File:The Journal of experimental zoology (1905) (14777022861).jpg

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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alf; its posterior half, however, lacks those parts whichwould have developed from the cell which was injured. Thisembryo is younger than the one shown in Fig. 34 and no sensespots are present, but the sense vesicle is closing in a normalmanner. This figure well shows that a part of the trunk mesen-chyme is derived from the anterior quadrants, and indeed fromthe pair of cells A^^, Fig. 6, while a portion of it comes from theposterior quadrants, as may be seen by comparing the right andleft sides of Fig. 35. The muscle cells are entirely lacking on theright side, the substance which would have formed them beinglocated in the injured cell B^; they are shown growing around theend of the notochord as in the half embryo shown in Fig. 33.The notochord and nerve tube are apparently full sized, which isexplained by the fact that they come from the anterior quadrants,but owing to the lack of the right side of the tail they are somewhatdistorted in form. Mosaic Development in Ascidian Eggs. 171
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