DEEP PERINEAL FASCIA. 



285 



gland and the vesiculae seminales, and is continuous with the recto- 

 vesical fascia of Tyrrell, which is attached posteriorly to the recto - 

 vesical fold of peritoneum, and serves the important office of retaining 

 that duplicature in its proper situation. 



Between the two layers of the deep perineal fascia are situated 

 therefore, the whole extent of the membranous portion of the urethra, 



Fig. 114.* 



* A side view of the viscera of the pelvis, shewing the distribution of the pe- 

 rineal and pelvic fasciae. 1. The symphysis pubis. 2. The bladder. 3. The 

 recto- vesical fold of peritoneum, passing from the anterior surface of the rectum 

 to the posterior part of the bladder ; from the upper part of the fundus of the 

 bladder it is reflected upon the abdominal parietes. 4 The ureter. 5. The 

 vas deferens crossing the direction of the ureter. 6. The vesicula seminalis of 

 the right side. 7, 7. The prostate gland divided by a longitudinal section. 

 8, 8. The section of a ring of elastic tissue encircling the prostatic portion of the 

 urethra at its commencement. 9. The prostatic portion of the urethra. 10. 

 The membranous portion, enclosed by the compressor urethrse muscle. 1 1 . 

 The commencement of the corpus spongiosum penis, the bulb. 12. The ante- 

 rior ligaments of the bladder formed by the reflection of the pelvic fascia, from 

 the internal surface of the os pubis to the neck of the bladder. 13. The edge of 

 the pelvic fascia at the point where it is reflected upon the rectum. 14. An in- 

 terval between the pelvic fascia and deep perineal fascia, occupied by a plexus 

 of veins. 15. The deep perineal fascia ; its two layers. 16. Cowpers gland of 

 the right side situated between the two layers below the membranous portion of 

 the urethra. 17. The superficial perineal fascia ascending in front of the root 

 of the penis to become continuous with the dartos of the scrotum (18). 19. 

 The layer of the deep fascia which is prolonged to the rectum. 20. The lower 

 part of the levator ani; its fibres are concealed by the anal fascia. 21. The 

 inferior segment of the funnel-shaped process given off from the posterior 

 layer of the deep perineal fascia, which is continuous with the recto-vesical 

 fascia of Tyrrell. The attachment of this fascia to the recto-vesical fold of peri- 

 toneum is seen at 22. 



