File:Amphioxus Transverse sections through embryos of different ages.jpg

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Fig. 65.— Transverse sections through embryos of different ages, illustrating the mode of formation and relations of the medullary tube, notochord, mesodermic somites, ete, (After HATSCHEK.)

The figures should have Leen lettered consecutively from 1 to A (they are thus referred to in the text), but the letters were accidentally omitted. a, Archenteron.ch, Notochord. gl. Club-shaped gland, gs’. First primary gillslit, m, Mouth. my. Myoccelomic pouches (mesodermic somites). n. Medullary plate and tube,

N.B.—In the last two figures the nuclei of the calomic epithelium, which has become extremely flattened, are

not well indicated. ‘Ihe nuclei are scarce enough, but not quite so scarce as would appear from the figures.
Date
Source https://archive.org/details/cu31924001026131/page/119/mode/1up?view=theater Amphioxus and the ancestry of the vertebrates. New York, London, Macmillan.
Author Willey, Arthur

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current08:28, 24 March 2024Thumbnail for version as of 08:28, 24 March 20241,741 × 1,206 (1.09 MB)Rasbak (talk | contribs){{information |description=Fig. 65.— Transverse sections through embryos of different ages, illustrating the mode of formation and relations of the medullary tube, notochord, mesodermic somites, ete, (After HATSCHEK.) The figures should have Leen lettered consecutively from 1 to A (they are thus referred to in the text), but the letters were accidentally omitted. a, Archenteron.ch, Notochord. gl. Club-shaped gland, gs’. First primary gillslit, m, Mouth. my. Myoccelomic pouches (mesodermic so...

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