174 



MIDDLE PERINEAL FASCIA. 



— 1. The Inferior perineal fascia, is somewhat of a triangular 

 shape, the narrowest portion being in front. It contains many 

 well marked transverse fibres, is attached to the rami of the 

 pubis and ischium of each side, and stretched across the inter- 

 Fig-. 166.* 



vening space, covering in several genital muscles and the root 

 of the penis. Anteriorly it is connected with the dartos muscle 

 of the scrotum, and the investing fascia of the penis. Poste- 

 riorly it terminates in front of the anus, by being reflected under 

 the transversus perinei muscles so as to communicate with the 

 anterior layer of the middle perineal fascia. 

 — 2. The middle fascia of the perineum called besides, deep 

 fascia, triangular ligament of the urethra, and Comperes liga- 

 ment is also attached but more internally than the inferior to the 

 rami of the pubis and ischium of each side, and is also firmly 



* The pubic arch with the attachments of the perineal fasciae. 1, 1, 1. The 

 superficial perineal fascia divided by a j^ shaped incision into three flaps ; the 

 lateral flaps are turned over the ramus of the os pubis and ischium at each 

 side, to which they are firmly attached. The posterior flap may be traced in 

 continuation with the middle perineal fascia. 2. The middle perineal fascia or 

 triangular ligament of the urethra. 3. The opening for the passage of the 

 membranous part of the urethra previous to its entering the bulb. 4. Two 

 projections of the anterior layer of the middle perineal fascia, corresponding 

 with Cowper's glands. — 



