[Illustration: _a._ Body of the Testicle. _b._ Tubuli Testis. _c, c._ Rete Testis. _d._ Vasa Deferentia. _e._ Vascular Cones. _f._ Epididymis. _g._ Vas Deferens.] The preceding completes the anatomical description of the Testicle. The semen is supposed to be secreted by the arteries that ramify among the seminal tubes; the last drawing exhibits the testicle as from the hand of the dissector. In life and in health the epididymis is attached to the testicle—the vas deferens passes up the chord, enters the abdomen, and, passing down into the pelvis, terminates in the vesiculæ seminales as already, but to be again, alluded to. The two subjoined drawings illustrate the testicles in their natural situation. [Illustration: _a._ Body of the Testicle. _b._ Commencement of the Epididymis. _c._ End of ditto. _d._ Vas Deferens.] In the larger figure the testicle is displayed as enveloped by its coverings, and in the lesser as stripped of them. The references serve for both. We now come to speak of the Vesiculæ Seminales. It was just observed, that the Vasa Deferentia terminated in these structures. They are attached to the lowest and back part of the bladder, behind the Prostate Gland. The following drawing is the prelude to the description—It represents the Prostate Gland, the Vesiculæ Seminales and the Bladder. [Illustration: _a, a._ Prostate Gland. _b._ Gland cut away to show the Ducts of the Vesiculæ. _c._ Ends of the Ducts. _d, d._ Cells of the Vesiculæ. _e._ Left Vas Deferens, also cut open to show its connexion with the Vesiculæ. _f._ Right Vas Deferens. _g, g._ Openings of the Vas Deferens and Vesiculæ into the Urethra. _h._ Bladder. _i._ Ureter.] The Vesiculæ Seminales appear like two cellular bags. They have two coats, the one called nervous, and the inner the cellular, a membrane divided into folds or ridges. The use of the vesiculæ is supposed to be, to act as reservoirs for the semen; but there are different opinions upon the subject, some contending that they furnish a fluid, not spermatic, but merely as an addenda to the seminal secretion; whereas others, who have examined the vesiculæ of persons who have suddenly died, have discovered all the essential qualities of the male seed therein; and, in fact, physiologists, who direct researches in these matters, advise such examinations as the surest means of obtaining, in a state of purity, the seminal fluid.