The structure and physiology of fishes explained and compared with those of man and other animals

by Monro, Alexander
Published 1785

Über den Darmkanal und die Zeugungsorgane der Fische /

by Rathke, Heinrich (1793-1860).
Published 1824

Bidrag til kundskaben om kjønsorganernes udvikling hos benfiskene /

by Jungersen, Hector F. E. (1854-1917)
Published 1889