Chap. XVI 1 1.] 



2* HE PERINEUM. 



345 



skin, can be followed from the anus along the middle 

 line of the perineum, scrotum, and penis. No vessels 



i a 



Fig. 36. The Male Perineum. (After EUdinger.) 



a, Gluteus maxiruus ; 6, senri-tendinosus and biceps ; c, adductor rnagnus: d, 

 gracilis; e, pyriformis : /, obturator internus ; #,quadratus femoris; /(, leva- 

 tor ani ; i, external sphincter; j, accelerator urma) ; Jc, erector penis: I, 

 transversus perinei ; 1, great sciatic nerve ; 2, external ha-morrboidal vessels 

 and nerve; S, superficial perinea! vessels and nerves; 4, pudic nerve (.cut) 

 and pudic artery ; 5, pudendal branch of small sciatic nerve. 



cross this line, and, therefore, in making incisions 

 into the perineum this line is always chosen when 

 possible. In the middle line, midway between the 

 centre of the anus and the spot where the scrotum joins 



