THE MALE GENITAL TRACT. 823 



also empty into the venous sinuses. The before-named observer 

 and Rouget have demonstrated that the so-called arteriae heli- 

 cinae, which take a spiral course, and are found mostly in the 

 posterior portions of the corpora cavernosa, are only the loops of 

 arteries visible in the collapsed condition of tne penis, and which 

 have no cecal terminations, as former anatomists thought. 

 Nevertheless, Henle maintains the existence of helicine blind 

 vessels and considers them as a sort of glandular apparatus. 

 The efferent veins collect on the upper and under surface of the 

 penis, uniting mainly in the vena dorsalis penis ; those of the 

 under surface receive the blood from the large cavernous sinuses. 

 The inner surface of all these veins is richly provided with ledge- 

 like, branching projections, which are composed of smooth 

 muscle-fibers ; free trabeculae of a similar structure also trav- 

 erse the calibers of the veins. 



