130 MUSCULAR SYSTEM, 



fibres (loosely connected by cellular tissue), clothing the mem- 

 branous portion of the urethra and the prostates. 



Action. — It will contract this part of the urethra; and, probably, 

 have some effect in discharging fluids from the prostates. 



ACCELERATOR URi N ^. — Permeo-urethralis. 



Situation. — Upon the bulb of the urethra, and around the 

 under parts of the penis. 



Form. — Elongated ; penniform. 



Attachment. — Incorporated with, and (may be considered as) 

 forming part of the penis itself. Posteriorly, it springs from the 

 middle and posterior part of the bulb of the urethra, where it is 

 joined by other (scattered) fasciculi, arising on each side of the 

 bulb from the perineum. It takes its course along the under part' 

 of the penis, and may be followed for some short distance upon 

 the glans ; the entire muscle, throughout its extent, forming a 

 complete fleshy investment to the urethra. 



Action. — To compress the urethral canal, thereby aiding in 

 the forcible discharge of the urine ; but more particularly, it would 

 seem, in the ejection of the seminal fluid. 



FEMALE GENITAL REGION. 



f Ischio-clitorideus. 



ERECTOR CL.TORlDIS.-|^^^.^.^_^^.^^^.^^^^^^ 



This pair of muscles spring from the perineum, at which place 

 their fibres are mingled with those of the sphincter ani. They 

 run to be attached to the upper and back parts of the clitoris. 



Actio7i. — To erect the clitoris, and thereby protrude it into 

 the vagina, in the act of coition. 



SPHINCTER VAGIN IE. — Perineo-cUtorideus. 



Consists of a broad bank of strong, red, fleshy fasciculi, en- 

 circling and clothing the orifice of the vagina ; and spreading 

 around the adjoining parts of the canal. 



In action, the sphincter will contract (and has the power to 

 close) the mouth of the canal. 



COCCYGEAL REGION. 



An anatomical knowledge of the muscles composing the tail 

 is indispensable to the scientific performance of the operation of 

 nicking. 



In denuding them (in dissection) the skin will be found to 

 grow soft and thin upon the under part of the tail, where there is 

 no hair; but thick again and coarse as it approaches the tip, at 



