. The physiology of the Invertebrata. PHYSIOLOGY OF THE INVERTEBRATA. 273. 274 PHYSIOLOGY OF THE INVERTEBRATA. most one which is a transparent and delicate sac-like bodyfilled with a clear fluid, and a ventral or an underlyingportion of a green colour, glandular in appearance, containinggranular cells. As is well known, these green glands were formerlybelieved to be the auditory organs of Astacus; but in 1848Drs. Will and Gorup-Besanez* stated that this organprobailycontained guanin, and from this supposition the green glandshave been considered as excretory organs. The secretion of these glan
. The physiology of the Invertebrata. PHYSIOLOGY OF THE INVERTEBRATA. 273. 274 PHYSIOLOGY OF THE INVERTEBRATA. most one which is a transparent and delicate sac-like bodyfilled with a clear fluid, and a ventral or an underlyingportion of a green colour, glandular in appearance, containinggranular cells. As is well known, these green glands were formerlybelieved to be the auditory organs of Astacus; but in 1848Drs. Will and Gorup-Besanez* stated that this organprobailycontained guanin, and from this supposition the green glandshave been considered as excretory organs. The secretion of these glands is acid to litmus paper, andon treating the secretions, obtained from a large number ofgreen glands, with hot dilute sodium hydroxide solution, andthen adding hydrochloric acid, a slight flaky precipitate wasobtained, and on examining these flakes under the microscopethey were seen to consist of small crystals in rhombic treating the secretion with alcohol these rhombic crystals(Fig. 54 A) were deposited; they were soluble in boilingwater. When these crysta
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinverte, bookyear1892
