. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Dr. A. Krohn on the Male Generative Organs 0/Phalangium. 149 XVIII.—On the Male Generative Organs of Phalangium. By Dr. A. Krohn*. From dissections which I have very recently made, it appears that the notions of Treviranus and Tulk as to the male sexual apparatus of Phalangium still generally adopted require to be essentially modified. The principal question here is as to the still unexplained signification of a gland-like organ furnished with two efferent ducts, which is situ
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Dr. A. Krohn on the Male Generative Organs 0/Phalangium. 149 XVIII.—On the Male Generative Organs of Phalangium. By Dr. A. Krohn*. From dissections which I have very recently made, it appears that the notions of Treviranus and Tulk as to the male sexual apparatus of Phalangium still generally adopted require to be essentially modified. The principal question here is as to the still unexplained signification of a gland-like organ furnished with two efferent ducts, which is situated in the abdomen upon the lower wall of the alimentary tube, occurs only in the male, and appears, as Treviranus asserts, to have some connexion with the other parts of generation. My investigations have proved that the above-mentioned organ is the testis; so that the pair of glands consisting of ramified lobes or cseca situated in the anterior part of the abdomen, to which Treviranus and Tulk ascribe the function of preparing the seminal fluid, have quite a different destination. When the abdomen is opened from the ventral surface, the testis falls out, and appears, after the removal of the adherent fatty body, as a sausage-shaped greatly curved organ f of a dull white colour, bridged over by the two retractor muscles of the penis (fig., a). From the extremity of each of its horns (which. The male generative apparatus of the second species of Phalangium men- tioned in the text, without the accessory glands. Its component parts are removed from their natural position in order to show their connexion. a. The Testis, b b. Vasa efferentia. c. Coil of the vas deferens. d. Dilated portion of the vas deferens, e. Sheath of the penis, with the penis (/) within it. g g. Retractors of the penis. are directed forwards, and do not reach to the part where the two breathing-orifices or stigmata occur on the outer surface * Translated by W. S. Dallas, , &c, from Wiegmann's Arc
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