THE VESSELS. 329 



Terminal branches: b. Perincea (superficialis'). Or.: at the posterior 

 border of m. trans, perinai. Course : from behind forwards, and from with- 

 out inwards on the inner side of m. ischio-cavernos., and terminates in the 

 centre of the scrotum as art. septi scroll. Position : above fasc. perin&i 

 superficialis, below, m. transfers, perin&i superf. Branches: transversa 

 perin&i passes behind transversely over the perinasum; scrotales posteriores s. 

 labiales, at the termination of the perinceum to the posterior part of the scrotum 

 or labia. 



c. Profunda perinai s. art. penis (clitoridis) is the name also given to that 

 part of the pudenda from the posterior border of m. transfers, perin. as far as 

 symphys. pubis. From it pass off: 



a. Bulbosa s. bulbi urethra, a large branch, transversely to the posterior 

 boundary of bulbus urethra; (or to the Vagina [the nympha] ), ramifying 

 in corp. cavernos. [spongiosum] urethra to the glans. 



b. Dorsalis penis, (or clitoridis) perforates between the roots of the corp. 

 cavernos. and the symphys. pub., the ligam. suspensor., passes close be- 

 neath the skin very tortuously upon the back of the penis to the glans, 

 behind which it forms a vascular circle, and supplies the foreskin and 

 glans. 



c. Cavernosa s. profunda penis (or clitoridis') passes in the middle of the 

 cavernous body along the septum, and ramifies very delicately inside it, 

 as far as the glans, anastomosing with the bulbosa and dorsal, pen., and 

 that of the other side through the septum. J. Muller's Artt. helicince, 

 the tendril-like tortuous capillary vessels of cavernosa, which terminate 

 blindly, and are said to give rise to the erectio penis , are probably artifi- 

 cial anatomical products. (Henle.) 



580. II. Cruralis, the external Iliac artery, 



the external branch of Iliaca communis, passes from the place of 

 division of the last in the pelvis, as Art. Iliaca externa, on to the 

 thigh, as : femoralis, as far as the popliteal space, where it is 

 called poplitcea. 



581. A. Iliaca externa. 



Origin : before the superior border of symphysis sacro-iliaca 

 from art. iliaca communis. Termination : at the femoral arch 

 in the centre between symphysis pubis and spina ilei super. 

 Length: three and a half inches. Course: extends obliquely 

 from above downwards, from within outwards, and rather for- 

 wards, into the pelvis. Position : covered before and internally, 

 loosely, by peritoneum; crossed by the ureter; separated from 

 it on the inner side of the m. psoas by fasc. iliaca ; before ven. 

 iliaca externa. Before the right art. iliaca rests the termination 

 of the small intestines ; before the left the sigrnoid flexure of 



