. Annals of tropical medicine and parasitology. Parasites. 26o portion of the parencli}-ma; they did not extend laterally nearly so far as the aporal water vessel. There appears to be no doubt that in old worms the testes degenerate and entirely disappear. No trace of testes were found in the worms from Horse A. Vas deferens. The appearance of the internal and external seminal vesicles varied considerably, and they did not exhibit any constant relationship one to the other. The outer seminal vesicle was usually ventral 'to the inner seminal vesicle, but this was not invariably the case; someti
. Annals of tropical medicine and parasitology. Parasites. 26o portion of the parencli}-ma; they did not extend laterally nearly so far as the aporal water vessel. There appears to be no doubt that in old worms the testes degenerate and entirely disappear. No trace of testes were found in the worms from Horse A. Vas deferens. The appearance of the internal and external seminal vesicles varied considerably, and they did not exhibit any constant relationship one to the other. The outer seminal vesicle was usually ventral 'to the inner seminal vesicle, but this was not invariably the case; sometimes the former lay directly internal to the latter, or even dorsal to it. Ovary. This first appears about segment 25 and disappears about segment 45. It attains its maximum development about segment 37. The poral wing has a diameter of about half that of the apoial wing. In structure it resembles that of A. rhodesiensis. VE\TR.\L Fig. 8. A. perfoliata. Segment, viewed posteriorly, showing female genitalia, ^ external vesicula seminalis ; , internal vesicula seminalis ; , longitudinal muscles ; /.»., lateral nerves ; ^ median nerve ; o., ovary; r.^., receptaculum seminis ; /.m., transverse muscles j e-., vagina ; ventral excretory vessel; ^ vitelline glands, x 20. (fig. 8). As in the case of the testes, the ovaries had entirely disappeared in worms from Horse A. Receptacidiim and vagina. The vagina appears earl\' and is well defined in about segment 8. These structures resemble in all respects those of A. rhodesicfisis. Vitelline and shell glands. Similar to those of .4. rhodesiensis. Uterus. The uterus appears very early, about segment 12, as a delicate cell-string running across the segment. It gradually. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Liverpool School of T
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectparasites, bookyear19
