. Elements of comparative anatomy. Anatomy, Comparative. Fig. 159. Female generative organs of Hydrobius fuscipes. o Ovarian tubes, ov Oviduct, beset with glandular appendages, gl Tubular glands, v Vagina. be, Bursa copulatrix. rs Receptaculum seminis (after Stein). tionately wider and coiled cascal tube, which is sometimes provided with an appended gland. The bursa copulatrix is another organ, which is directly con- nected with the vagina; it is a wide cascal-sac (Fig. 159, be), which looks like a diverticu- lum of the wall of the ( \\\ ) vagina. This organ is found in some orders only, and e
. Elements of comparative anatomy. Anatomy, Comparative. Fig. 159. Female generative organs of Hydrobius fuscipes. o Ovarian tubes, ov Oviduct, beset with glandular appendages, gl Tubular glands, v Vagina. be, Bursa copulatrix. rs Receptaculum seminis (after Stein). tionately wider and coiled cascal tube, which is sometimes provided with an appended gland. The bursa copulatrix is another organ, which is directly con- nected with the vagina; it is a wide cascal-sac (Fig. 159, be), which looks like a diverticu- lum of the wall of the ( \\\ ) vagina. This organ is found in some orders only, and even in them it is not generally pre- sent. The bursa copu- latrix of the Coleop- tera appears to be the most independent, and not unfrequently is of a considerable size; in them it is generally connected to the va- gina by a canal. In the Lepidoptera also it opens into the va- gina by a narrow duct; but it is remarkable from the fact that it has another efferent duct in addition to this one, which it sends off below the female generative pore, where it opens separately. In the Lepidoptera fertilisation is effected by means of this canal, the spermatozoa pass- ing into the receptaculum seminis from the bursa copulatrix by the above-mentioned duct, which connects it with the vagina. The open- ings of the two parts into the vagina are opposite to one another. The accessory glandular organs of the vagina either consist of a pair of simple canals which gene- rally form long loops (Fig. 160, gl) (Lepidoptera, many Diptera), or of short caecal tubes (Bugs). In others they are greatly ramified (Ichneumonidge and Tenthredinidas). The secretion of these cement- glands serve to attach the eggs when laid, and at times to unite them into masses. As a rule some portions of the integument, which have the form of valves, are connected with the female genital pore; the markings on these valves are always exactly adapted to the male copulatory organ ; sometimes they are arranged like nippers, an
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectanatomycomparative
