1066 



URINARY AND REPRODUCTIVE ORGANS 



abdominal fascia with Poiipart's ligament and to the margin of the saphenous 

 opening. 



Superficial perinaeal interspace (figs. 647, 652, 654).— Detaching the fascia 

 of Colles from its connections, the dissector oi)ens the superficial interfascial space 

 and exposes its contents, nameh^: — (1) The crura of the corpora cavernosa Avith 

 the ischio-cavernosi ; (2) the bulb of the corpus spongiosum with the bulbo- 

 cavernosi; (3) the ca])riciously scattered fil)n'S of the superficial transversi 

 perineei ; (4) the arteries of the corpora cavernosa and the dorsal arteries of 

 the penis witli their associated veins and lymphatics; (5) the dorsal nerves 

 of the penis; and (6) the superficial perinaeal vessels and nerves. The roof 

 of the space (the so-called floor) is formed by the inferior triangular ligament. 



The transversi perin^ei, the crura penis Avith the ischio-cavernosi, and the bulb 

 with the bulbo-cavernosi, have been already described (pages 1034, 1035). .Each of 

 the muscles named has a fascial sheath of its own, distinct from the fascia of Colles. 



The artery of the corpus cavernosum enters the crus immediately after 

 piercing the inferior triangular ligament; the dorsal artery of the penis, reaching 

 the interfascial space more anteriorly with the dorsal nerve, runs forwards to the 

 dorsum of the united cor]iora cavernosa to take its place between the vein and 

 nerve; the superficial perinaeal vessels and nerve given off from the internal 



Fig. 654. — Diagram of the Superficial and Deep Triangulae Ligaments. 



Subpubic ligament with aperture for 

 dorsal vein of the penis 



Apertures for dorsal artery and ( 

 nerve of the penis \ 



Crus penis 

 Aperture for artery of corpus 

 carernosii/ii 

 Superficial triangular ligament 

 Ischio-eavernoBus, or erector penis 

 Aperture for artery 

 to bulb 

 Urethral aperture 

 Aperture for Cow- 

 per's duct 

 Position of bulb 



Apertures for super- 

 ficial perineeal 

 vessels and nerve 



Fascia of Colles. 

 turned backwards 



DORSAL KERVE 

 ~__ Anterior layer of triangular 

 ^« ligament 

 — jS- Dorsal artery of penis 

 \ Deep triangu- 



lar ligament 

 Artery of corpus 

 cavernosum 



A rten/ to bulb 



Piidic veins 

 DORSAL NERVE 



POSITION OF COWPER'S 

 GLAND 



Tnternal pudic artery 



Posterior border of 

 perinaeal ledge 

 (junction of trian- 

 gular ligaments 

 with fascia of 

 Colles; 



pudic trunks in the ischio-rectal fossa enter the interfascial space near the free 

 border of the perinatal ledge. These divide into two sets of branches, posterior or 

 deep, to the penile muscles, and anterior or superficial to the scrotal and perina?al 

 integument; the latter piercing the fascia of Colles and the scrotal investment con- 

 tinuous with it to reach the skin. 



The superficial perinteal interspace then may be said to contain the root of the 

 penis, with the muscles, vessels, and nerves connected with it. 



Superficial or inferior triangular ligament ( ' the anterior layer of the triangu- 

 lar hgainent ' ) (fig. 652). — On removing the contents of the superficial interspace the 

 dissector exposes the under surface of the inferior or superficial triangular ligament. 

 This structure forms almost a horizontal plane in the erect posture of the l)ody, and 

 consists of strong bands of fi])rous tissue, running for the most part in a transverse 

 direction across the sul)pubic arch to be attached firmly to the ischio-pul)ic rami 

 above the line of attachment of the fascia of Colles and of the penile muscles. 

 Anteriorly, it is separated from the subpul)ic ligament l)y an interval which trans- 

 mits the dorsal vein of the penis; posteriorly, it ])lends with the fascia of Colles 

 and with the superior triangular ligament to form the hinder border of the perinaeal 

 ledge; and superiorly it is intimately related to the deep transversus perinsei 



