PERINEUM OF THE FEMALE. 



401 



Surface-marking. In the middle line, there are the two apertures of 

 the anus and vulva, which are separated from one another by an interval 

 of about an inch. The anus is situate rather farther back than in the 

 male. And the vulva with the labia majora on the sides is placed in the 

 situation of the scrotum of the other sex. 



Within the vulva at the upper part, is the clitoris, and two small mem- 

 branous folds, labia minora, extend downwards from it. Below the clitoris 

 is the small aperture of the urethra ; and still lower down is the vagina, 

 whose opening is sometimes partly closed by a thin piece of membrane, 

 the hymen. 



Deep boundaries. The deep boundaries of the perineum are alike in 

 both sexes; but in the female the outlet of the pelvis is larger than in the 

 male. 



Fig. 133. 



THE FEMALE PERIN;ETTM (from Dr. 

 Pudic artery. 

 Branch to levator ani. 

 Inferior hsemorrhoidal artery. 

 Transverse artery. 



Great labial (superficial perineal) artery. 

 Dorsal artery of clitoris. 

 Artery of bulb 

 Artery to crus clitoridis. 

 Inferior haemorrhoidal nerve. 

 Pudic nerve. 

 Muscular branch. 



Internal superficial perinav.il nerve. 

 External superficial perinaeal nerve. 

 Its junction with 

 Inferior pudendal nerve. 

 Small sciatic nerve. 

 IS. Dorsal nerve of clitoris. 



vage's "Illustrations"'). 

 19. Ilio-ingainal nerve. 

 A. Anus. 

 C. Clitoris. 

 M. Meatus urinarins. 

 L. Great sacro-sciatic ligament. 

 V. Vagina. 



0. Coccyx. 



T. Tuberosity of i-ichium. 

 a, Gluteus mixiiuus 



c. Levator ani. 



d. Superficial transverse muscle. 



e. Compressor bulbi. 

 g. Erector clitoridis. 



h. Triangular ligament (cut). 



1. Biceps and semi-tendinosus. 

 J. Adductor magtius. 



fc. Gracilis. 



Dissection. The steps of the dissection are much the same in both 

 sexes, and the same description will serve, generally, for the male and 

 female perinaeum. 



First, the dissection of the ischio-rectal fossa is to be made. After- 

 26 



