Proceedings of the Royal Society of London/Volume 2/On the Mode of Generation of the Lamprey and Myxine

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On the Structure of the Organs of Respiration in Animals which appear to hold an intermediate Place between those of the Class Pisces and the Class Vermes, and in two Genera of the last-mentioned Class

Proceedings of the Royal Society of London, Volume 2

On the Mode of Generation of the Lamprey and Myxine by Everard Home

On the Multiplication of Images, and the Colours which accompany them in some Specimens of calcareous Spar

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2567667Proceedings of the Royal Society of London, Volume 2 — On the Mode of Generation of the Lamprey and MyxineEverard Home

On the Mode of Generation of the Lamprey and Myxine.⁠By Sir Everard Home, Bart. V.P.R.S.⁠Read June 15, 1815.⁠[Phil. Trans. 1815, p. 265.]

The present may be regarded as an addition to those reasons which the author lately gave for placing the Lamprey and Myxine in a rank intermediate between fishes and vermes; for instead of having distinct sexes, as is the case in perfect fish, Sir Everard Home observes that they are hermaphrodite.

He finds that the organs, which have been hitherto taken for kidneys in supposed females, are in reality testicles, and that the supposed males are really fish without spawn, in consequence of their not breeding two seasons together.