iv THE GENEKATIVE SYSTEM OF THE MALE 145 



the corona. As the complete unsheathing of the glans is hindered 

 when the frenulum preputii (the objective sign of male virginity) 

 is intact, it is torn during the first sexual connection, with some 



Sec. 



Sec. 



FIG. 36. A, swelling of the glans of a dog as the result of stimulation of the nervus erigens ; B, 

 diminution of same following electrical stimulation of the nervus pudendus. (Franc.ois-Franck.) 



Press, ar 



VoU 3 ! 



Press ven. 



Sec. 



FIG. 37. Simultaneous records of swelling of the glans of dog (as the result of electrical stimula- 

 tion of the nervus erigens) and of the blood pressures in the dorsal artery and vein of the penis. 

 (Francois-Franck.) 



effusion of blood which corresponds to what is called defloration 

 in the female sex. 



V. The erection of the penis is the preparatory act for the 

 ejaculation of the semen, which is a mixture of the secretions of 

 the testes, the vesiculae seminales, the prostate, and Cowper's 

 glands. Ejaculation occurs when the erotic orgasm has reached its 



VOL. v L 



