Til 1C II AND I. EC. 331 



structures seen in figures 229 and 230; (2) of structures seen in figure 233. 

 After having removed the skin, only a little developing is necessary to expose 

 all the structures seen in figures 229 and 230. To give an adequate idea of the 

 subject, stud}- the following to learn what you are expected to find in the first 

 stage of the dissection : 



1. 1'lie deep layer of the superficial fascia that you see in figure 230 turned 

 outward and marked Colics' fascia. Notice this is attached to the ischio-pubic 

 ram us and to the triangular ligament, whose cut edge shows in figure 230. This 

 is called the fascia of Colics. 



2. Around the anus you will see a very delicate layer of muscular fibres that 



8ULBO-CAVEHNOSU3 



Superficial triangular ligament 



ISCHIO-CAVERN08US 



MuBcles of thigh 



INFERIOR PUD END A L NERVE 

 *l'ri-:RFICIAL PERIX&AL SERVE 



INFERIOR IIMMORRHOIDAL NERVE 

 CUTAXEOl'S BR.IXCH OF FOURTH SACRAL 



Oluteua maximal 

 TUBEROSITY OF ISCHIUU 

 Great Bacro-sciatio ligament 

 Locator ani 



Superficial trausversus perineel 

 Sphincter aui 



FIG. 229. THE MALE PF.RINKUM. (Modified from Hirschfeid and Leveilli.) 



throws the margin of the anus into folds the corn/gator ends ani, a dermal 

 muscle. 



3. In the anterior triangle you see the three large pyramids originating, which 

 come together to form the penis: (i) The /;////; in the centre, being the lower 

 part of the corpus spongiosum ; (2) the cnira, parts of the corpora cavernosa 

 on each side, in firm connection with the iscliio-pubic rami. 



4. The bulb, covered by a muscle called the accelerator urina in the male. 

 Depress the sound and you can make this bulb stand out very prominently. 

 (Fig. 230.) 



5. The cms /'c/iis, covered by a muscle called the erector penis ischio-cavern- 



