File:The veterinary bacteriological laboratories. Issued in commemoration of the opening of the new laboratories at Onderstepoort, Pretoria, October, 1908 (1909) (20695163666).jpg

Title: The veterinary bacteriological laboratories. Issued in commemoration of the opening of the new laboratories at Onderstepoort, Pretoria, October, 1908
Identifier: cu31924000278485 (find matches)
Year: 1909 (1900s)
Authors: Transvaal (Colony) Dept. of Agriculture
Subjects: Pretoria. Veterinary research laboratories; Veterinary medicine
Publisher: Pretoria, The Government Printing and Stationery Office
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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126 on transverse sections, in typical arrangement as described by Wolffhiigel, only that (in *S. hepatica and in S. centrijmnctata) it is connected with the uterus and not with the ovary. Out of this organ the egg-pouches develop; the eggs leaving the uterus, which atrophies, finally collect in the egg- pouches. Topography of a Segment at Male Sexual Kipeness. The genital organs, as has already been explained, open irregularly alternately to the right or left. At the stage when the spermatozoa are maturing and the first have reached the receptaculum seminis, the genital organs, which all lie in the transverse plain, are composed as follows :— There are three, four, or more testes on each side of both right and left ventral canals, lying slightly dorsally ; all contain spermatozoa and also spermatoblasts. Vasa efterentia can be fo\ind upon very careful search; they appear to run from the testicle direct to the vas deferens. The vas deferens crosses the dorsal side of the median zone, quite close to the transverse muscles, from the aporose to the pore side. Just before reaching the cirrhus pouch, laterally to the ventral canal, it becomes much dilated and crammed with spermatozoa and is no longer straight, but wound in a few spirals. Having entered the cirrhus pouch it is wound up in a number of convohitions, still filled with spermatozoa ; the terminal portion is straight, easily distinguishable by the dark blue staining of the ciliated layer next to its lumen. The length of this ciliated portion is 63 //.; breadth about 3 f/.. The genital pore is extremely small, probably no longer functional. The end of the cirrhus bends over and joins the vagina; it is not introduced into the vagina, but appears to be fused to the end of it. (Fig. 6.) There is a short, very narrow connection between vagina and pore. SCHKMATic Diagram of the Principal Organs at Male Sexual Maturity.
Text Appearing After Image:
Krjjlauation of Figure. V. vagina. t. testicle. r.s. receptaculum seminis c.p. cirrhus pouch. 0. ovarium. n nerve. g.o. genital aperture. o.d. oviduct. v.c. ventral canal. v.d. vas deferens. u.d. uterine dnct. d.c. dorsal canal. v.c. vas efEerens. u. uterus.

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