THE MALE PERINEUM. 231 



with the suspensory ligament of the penis, and is held by some anatomists to 

 prove that the deep layer aforesaid is not continuous in front with the dartos 

 of the scrotum. This fascia was named from Dr. Buck, an American surgeon, 

 who, in 1846, first insisted on the importance of this structure. It modifies the 

 direction of urinary infiltration of the perineum, until perforated. 



What is the Triangular Ligament of the Urethra ? According to 

 some authorities it is the anterior layer of the deep perinea! fascia ; according 

 to others it includes the posterior layer also. Prof. Pancoast includes in the 

 term " Triangular Ligament ' ' all three layers which are united at the central 

 tendinous portion of the perineum, including, therefore, the deep layer of the 

 superficial perineal fascia. 



Name the Structures which lie between the Layers of the Deep 

 Perineal Fascia. In this space, which by some writers is termed the Cavity 

 of the Triangular Ligament, are the 



Membranous Portion of the Urethra. 

 Compressor Urethra Muscle. Artery of the Bulb. 

 Pudic Vessels and Nerve. Nerve of the Bulb. 



Cowper's Glands and Ducts. Plexus of Veins. 



What Structures lie behind the Posterior Layer of the Deep 

 Perineal Fascia ? They are the 



Bladder. Rectum. 



Prostate Gland. Levator Anti Muscle. 



Ischio-rectal, or Anal Fascia. 



Enumerate the Structures situated between the Anterior Layer of 

 the Deep Perineal Fascia and the Deep Layer of the Superficial 

 Perineal Fascia. They are as follows, the 



Crura of the Penis. Erector Penis Muscle. 2 



Corpus Spongiosum. Transversus Perinei Muscle.* 



Bulb of the Urethra. Transversus Perinei Artery. 



Accelerator Urines Muscle. 1 Superficial Perineal Vessels. 



Enumerate the Structures which are divided in the Lateral Opera- 

 tion of Lithotomy. If the knife is inserted i^ inch above the verge of the 

 anus, and carried to a point ^ inch below that orifice, and about half-way 

 outwards to the tuber ischii (Gross], it will divide the 

 Skin and Superficial Fascia (ist Layer). 

 Inferior tfemorrhoidal Vessels and Nerves. 

 Deep Layer of the Superficial Fascia. 

 Siiperficial Perineal Vessels and Nerves. 

 Accelerator Urines Muscle * (posterior fibres). 

 Transversus Perinei Muscle 3 and Artery. 



