Fig- 155' Male Perineum. II. Recto-Urethral Muscle. Prostate. 



Tlie Perineum is exposed by a U'ianguUw iviiidoiv section. The Vessels and 

 Nerves have been completely removed. By dividing and throwing back the 

 Anal Sphincter tlie Recto-Urethral Muscle lias been exposed to view and the 

 Prostate exhibited by separation of some of the thin fibres of the Levator Ani. 



In front of the Anus the divided Superficial Anal Sphincter fibres are shewn , 

 anteriorly in the narrow space between them deeper fibres which pass trans- 

 versely, further forward the retracted fibres of the l.evator Ani Muscle; and 

 between these fibres and the Central point stretches the Recto-Urethral Muscle 

 which blends, posteriorly, with the Levator Ani Muscle and the Rectal Wall, 

 anteriorly, witli the Transverse Perineal Muscle, the Raphe and the fibres of the 

 Bulbo-Cavernosus Muscles as well as the Membranous Portion (Waldeyer) of 

 the Urethra. On either side of the Recto-Urethral Muscle the Prostate is exposed 

 to view. (This dissection can be carried out in the course of operations.) 



In the triangle between the Superficial Transverse Perineal Muscle and 

 the Pubic Angle, the superficial fascia of the Perineum which covers the Ischio- 

 and Bulbo-Cavernosus Muscles is seen on the right side. On the left side the 

 fascia has been removed so that the muscles mentioned and the superficial layer 

 of the triangular ligament are exposed. 



The Superficial Fascia is a true superficial fascia, but the triangular liga- 

 ment is an Aponeurosis (v. Bardeleben). 



