. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 594 MEGUMI VERI AND TOKIO KABURAKI : across the median line. Behind the pharyngeal folds, the uteri gradual- ly narrow as they proceed backward ; slightly behind the penis, they unite in the median line to form a short unpaired uterine duct before joining the thick-walled median vaginal passage on the ventral side. Fig. 3. ti vp g pg. av vb p ed sv vd Fig. 3. Genital end-organs of N. fulvoptmctatus in sagittal section, diagrammatically shown. av accessory vesicle of vagina, ed ejaculatory duct, g gut, p penis, pg prostatic gland,
. Annotationes zoologicae japonenses / Nihon do?butsugaku iho?. 594 MEGUMI VERI AND TOKIO KABURAKI : across the median line. Behind the pharyngeal folds, the uteri gradual- ly narrow as they proceed backward ; slightly behind the penis, they unite in the median line to form a short unpaired uterine duct before joining the thick-walled median vaginal passage on the ventral side. Fig. 3. ti vp g pg. av vb p ed sv vd Fig. 3. Genital end-organs of N. fulvoptmctatus in sagittal section, diagrammatically shown. av accessory vesicle of vagina, ed ejaculatory duct, g gut, p penis, pg prostatic gland, sv seminal vesicle, 11 unpaired uterine duct, vb vagina bulbosa, vd vas deferens, vp vaginal passage. The vaginal passage is lined with a ciliated columnar epithelium, outside which is a thick muscular coating composed of an internal longitudinal and an external circular layer of fibres. A large number of ductules from unicellular glands, which produce a secretion similar in nature to that of the prostatic gland, open into the vaginal passage through the wall. Posteriorly the passage is continued for a short distance as the wide duct of the large and sac-like accessory vesicle. This vesicle has a wall consisting of a thick glandular epithelium and a fine muscular coating ; in the cavity are contained spermatozoa together with a coagulum of the secretion. In the anterior parts the vaginal passage makes an abrupt downward bend and passes over into a space with a thick and somewhat plicated wall. This space. 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 Nihon Do?butsu Gakkai; To?kyo? Do?butsu Gakkai. Tokyo : Societas
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Keywords: ., bookcentury1800, bookcollectionbiod, bookdecade1890, bookyear1897
