Abstract
As is evident from every textbook of zoology, the internal skeleton or notochord of amphioxus (Branchiostoma lanceolatum) has been considered as a passive supporting organ by all but a very few investigators. Our examination, using modern techniques, however, supports the view of Ebner1 and Joseph2, who proposed a muscular nature of the notochord (Fig. 1).
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References
Ebner, V. von S. B., Akad. Wiss. Wien. Math.-Naturw., Kl., 104 (3), 199 (1893).
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FLOOD, P., GUTHRIE, D. & BANKS, J. Paramyosin Muscle in the Notochord of Amphioxus. Nature 222, 87–88 (1969). https://doi.org/10.1038/222087a0
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DOI: https://doi.org/10.1038/222087a0
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