THIGH AND LEG. 



33 1 



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, study the following to learn what you are expected to find in the first 

 stage of the dissection : 



1. The 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 Colles. 



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



BUL80-CAVERNOSUS 



Superficial triangular ligament 

 ISCHIO-CAVERN03U8 





INFERIOR PUDENDAL NERVE 



.-ri'j-i:i-ir/AL I'KI;I.\\EAL NERVE 



INFERIOR llJEMOHIilfOIUAL NERVE 

 CUTANEOUS BRANCH OF FOURTH SACRAL 



Gluteus maximus 



TUBEROSiTY OF ISCHIUM 

 Great sacro-sciatic ligament 

 Levator ani 

 Superficial transveraua perinaei 



Sphincter aui 

 FIG. 229. THE MALE PERINEUM. (Modified from Hirschfeld and LeveillS.) 



throws the margin of the anus into folds the corrugator cntis ani, a dermal 

 muscle. 



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

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

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

 on each side, in firm connection with the ischio-pnbic rand. 



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

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

 (Fig. 230.) 



5. Tlie cms penis, covered by a muscle called the erector penis ischio-cavern- 



