190 MYOLOGY, OR ANATOMY OF MUSCULAR SYSTEM 



Colics, bound to the ischiopubic rami as far back as the ischial 

 tuberosities; on a line from this tuberosity to the central point 

 of the perineum it turns around the transversus perinei muscle 

 and becomes deep perineal fascia. There is an incomplete 

 median septum, so that extravasated urine distends one side 

 of the scrotum beneath the dartos, then penetrates to the other 

 side, then to the front of the abdomen beneath the superficial 

 fascia, but does not pass to the posterior half of the perineum 

 nor down upon the thighs. Buck's fascia is the continuation 

 forward of Colles' fascia, investing the penis as far as the 

 glims, continuous with the dartos, and directing the urine as 

 already stated. 



The deep perineal or subpubic fascia or triangular ligament 

 of the urethra is stretched across the subpubic arch on the 

 deep surface of the crura and bulb, and consists of two layers; 

 the inferior layer extends back to the central point of the 

 perineum, attached to the ischiopubic rarni, connected at its 

 base with the other layer, and continuous with the recurved 

 margin of the superficial perineal fascia. This layer, meeting 

 from below the arcuate pubic ligament (subpubic), forms an 

 aperture for the dorsal vein of the penis. It is perforated by 

 the urethra, arteries of the bulb and of the corpora cavernosa, 

 and ducts of Cowper's glands. 



The superior (deep) layer consists of right and left lateral 

 halves, separated in the middle line by the urethra close to the 

 prostate, and continuous on each side with the fascia covering 

 the obturator internus muscle. The levator ani is between 

 this layer and the recto vesical fascia. 



Between the two layers of the triangular ligament are the 

 membranous portion of the urethra, the compressor ure three 

 muscle, Cowper's glands, pudic vessels, and dorsal nerves 

 of the penis. 



THE FASCLffi OF THE PELVIS 



This consists of two parts, obturator and rectovesical fascia. 



The obturator fascia covers the inner surface of the obturator 

 internus muscle; it is attached to the iliac portion of the ilio- 

 pectineal line, to the body of the pubis, to the great sacrosciatic 

 notch and great sacrosciatic ligament, and upper edge of the 

 obturator membrane; below it joins the falciform process of 



