Henry Gray (1825–1861). Anatomy of the Human Body. 1918.
3c. 4. The Ejaculatory Ducts
The ejaculatory ducts (Fig. 1153) are two in number, one on either side of the middle line. Each is formed by the union of the duct from the vesicula seminalis with the ductus deferens, and is about 2 cm. long. They commence at the base of the prostate, and run forward and downward between its middle and lateral lobes, and along the sides of the prostatic utricle, to end by separate slit-like orifices close to or just within the margins of the utricle. The ducts diminish in size, and also converge, toward their terminations.