Pelvic filanients of lepidosiren

ABSTRACT I FULLY agree with Mr. Beadle's remarks, with the following exception; there is no reason why the filaments should not absorb oxygen if the concentration of oxygen in the

surrounding water were greater than that in the blood of the fish. In fact, I have shown by the experiments recorded in my paper in the _Proceedings of the Zoological Society_, 1932, that,

even in the absence of filaments, the skin absorbs oxygen when the concentration in the surrounding water is high and also gives out carbon dioxide very freely. But the evidence we now have

indicates that the water in the nest-burrow is almost, if not completely, destitute of oxygen, and the fact that the filaments are only developed during the period when the male is with the

eggs or larvæ in the nest-burrow can only be explained by the assumption that the respiration of the larvæ depends on the oxygen emitted by the filaments. To me it is incredible that the

male should be competing in the nest-burrow with the larvæ for oxygen, of which the amount present would soon be reduced to zero if it was not already so when the eggs were first laid.

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Department, London Hospital Medical College, Mile End, E.1. J. T. CUNNINGHAM Authors * J. T. CUNNINGHAM View author publications You can also search for this author inPubMed Google Scholar

RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE CUNNINGHAM, J. Pelvic Filanients of Lepidosiren. _Nature_ 132, 244 (1933).

https://doi.org/10.1038/132244a0 Download citation * Issue Date: 12 August 1933 * DOI: https://doi.org/10.1038/132244a0 SHARE THIS ARTICLE Anyone you share the following link with will be

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