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File:Origin of Vertebrates Fig 168.png

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English: Fig. 168.—Diagram illustrating the Position of the Pleural Folds and Gonads in Ptychodera (A) and Amphioxus (B) respectively.


Al., alimentary canal; D.A., dorsal vessel; V.A., ventral vessel; g., gonads; NC., notochord; C.N.S., central nervous system.
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Source The Origin of Vertebrates. https://archive.org/details/originofvertebra1908gask
Author Walter Holbrook Gaskell.


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current09:58, 11 November 2013Thumbnail for version as of 09:58, 11 November 20131,671 × 711 (65 KB)Keith Edkins (talk | contribs)== {{int:filedesc}} == {{Information |Description={{En|Fig. 168.—Diagram illustrating the Position of the Pleural Folds and Gonads in Ptychodera (A) and Amphioxus (B) respectively. ''Al.'', alimentary canal; ''D.A.'', dorsal vessel; ''V.A.'', ventr...

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