DISSECTING MANUAL. 



median raphe under bulb and corpus spongiosum. Course; 

 outward and forward, surrounding bulb, corpus spongiosum, 

 and root of penis. Insertion; under surface of triangular liga- 

 ment; membrane over corpus spongiosum; fascia on dorsum 

 of penis. [436] 



Ischio-bulbosus (inconstant). Origin; ischium. Course; 

 over Bulbo-cavernosus. Insertion; a raphe, superficial to 

 Bulbo-cavernosus. [436] 



Compressor Hemispherium Bulbi. This surrounds the end 

 of the bulb, under the Bulbo-cavernosus. [436] 



Sphincter Vaginae. This consists of two layers covering the 

 bulbs, separated by the vaginal and urethral orifices. Origin; 

 central point of perineum. Insertion; root of clitoris, partly 

 embracing corpora cavernosa. [436] 



Ischio-cavernosus (Erector penis.) Origin; ischial tuber- 

 osity; great sacro-sciatic ligament. Course; forward. Inser- 

 tion; under surface of cms penis, and outer side and dorsum 

 of corpus cavernosum. In the female (Erector clitoridis) it is 

 smaller. [436] 



Pubo-cavernosus (inconstant). Origin; pubic ramus. In- 

 sertion; dorsum of penis. [437] 



Compressor Urethras (on pelvic aspect of triangular liga- 

 ment) . Origin ; lower part of pubic ramus. Course ; radiating 

 inward and enclosing urethra. Insertion ; median raphe in front 

 of and behind urethra. Certain fibres, without bony attach- 

 ment, form a sheath for the urethra. In the female it is smaller; 

 the anterior fibres are continuous with those of the opposite 

 side, in front of the urethra; the middle fibres pass between 

 the urethra and vagina; the posterior fibres join the side of 

 the vagina with the Transversus perinei profundus (transver- 

 sus vagime). [437] 



Transversus Perinei Profundus (a bundle lying below and 

 behind the preceding). Origin; ascending ramus of ischium. 

 Insertion; median raphe. [437] 



Ischio-pubicus (inconstant). A bundle lying above and in 



[196] 



