NOTE IX., CHAPTER II., p. 82. THE GREEN GLAND.
Reading edition
NOTE IX., CHAPTER II., p. 82. THE GREEN GLAND.
The existence of guanin in the green gland rests on the authority of Will and Gorup-Besanez (Gelehrte Anzeigen, d. k. Baienzschen Akademie, No. 233, 1848), who say that in this organ and in the organ of Bojanus of the freshwater mussel, they found “a substance the reactions of which with the greatest probability indicate guanin,” but that they had been unable to obtain sufficient material to give decisive results.
Leydig (Lehrbuch der Histologie, p. 467) long ago stated that the green gland consists of a much convoluted tube containing granular cells disposed around a central cavity. Wassiliew (“Ueber die Niere des Flusskrebses:” Zoologischer Anzeiger, I. 1878) supports the same view, giving a full account of the minute structure of the organ, and comparing it with its homologues in the Copepoda and Phyllopoda.