Text-book of comparative anatomy . acs,which may be called egg-follicles, and they thence enter the ovariantube, which serves only as a duct. With very rare exceptions the ducts of the sexual organs arepaired. These unite in their terminal portion, and open externally 1 See footnote on page 516. VI AEACHXOIDEA—SEXUAL OEGANS 533 through an unpaired ventral genital aperture at the anterior end ofthe abdomen. Several organs, chiefly accessory, are connected withthe terminal portion of the ducts, viz. receptacula seminis, vesicularseminales, glands, male and female copulatory organs. The anatomica
Text-book of comparative anatomy . acs,which may be called egg-follicles, and they thence enter the ovariantube, which serves only as a duct. With very rare exceptions the ducts of the sexual organs arepaired. These unite in their terminal portion, and open externally 1 See footnote on page 516. VI AEACHXOIDEA—SEXUAL OEGANS 533 through an unpaired ventral genital aperture at the anterior end ofthe abdomen. Several organs, chiefly accessory, are connected withthe terminal portion of the ducts, viz. receptacula seminis, vesicularseminales, glands, male and female copulatory organs. The anatomicalstructure of the sexual apparatus in the different Arachnoidea variesgreatly in detail. The review which follows is incomplete, and onlytakes into account the better known forms. Scorpionidse. Female Apparatus (Fig. 375, A).—Three longitudinal tubes, bo<-twith spherical ovarian follicles, lie in the pre-abdomen, one median and two median tube is connected with the lateral by 5 transverse anastomoses, also beset. FIG. 375.—Female sexual apparatus of various Arachnoidea. Most uf the figures are some-what diagrammatic. A, Scorpio occitanus (after Blanchard). B, Galeodes barbarus (after ). 0, Trichodactylus anonymus (Awrid) female sexual organs of the nymph (afterNalepa). D, An Araneid. E, Pentastoma taenioides (after R. Leuckart). F, Phalangiumopilio (after Gegenbauer). G. Cepheus tegeocranus (oribatid) (after Michael). 11. Gamasuscrassipes (Acarid) (after Winkler). /, Trombidium fuliginosum (after Henking). or, ovaries:oil, oviduct; go, genital aperture ; r$, receptaculum seminis ; or (in Q, outer aperture of the same ;va, vagina (in E also the uterus) ; op, ovipositor; a, glandular appendages. with ovarian follicles, so that the ovigerous portion of the sexual apparatus formsa network of 8 meshes. From the anterior end of this there arises on each sidean oviduct, which at once swells into a rather long tube (receptaculum seminis, orvagina ?) The two
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
