Corpus Spongiosum and the Corpus Cavemosum. 

 <j Fig. 8. h 



27 



Fig. 8 — g, h, i, j, k, I — represents the various shapes of the arterife helicinze, 

 which are frequently found in injected preparations of the corpus cavemosum. 

 Magnified 15 diameters. 



The description of the plates is taken from ' Die Kationelle Behandlung der 

 Harnrohren-stricturen,' by Dr. B. Stilling. 



tion subsides, when the acceleratores urinae and erectores penis 

 muscles relax, and remove the pressure from the veins. The tra- 

 beculae (non-striped muscles) of the penis now contract and expel 

 the blood from the dilated venous cells. 



The contractile force of the corpus spongiosum is well displayed 

 in persons who, for the first time, submit to the introduction of a 

 catheter or sound into the urethra ; the entrance of the instrument 

 is often sensibly opposed, and during withdrawal it is forcibly 

 expelled. 



This phenomenon cannot be attributed entirely to the action of 

 the acceleratores urinae and compressor urethrae muscles, for it is 

 manifest even within an inch of the external meatus. 



The action of the muscular trellis-work of the corpus spon- 

 giosum, as it affects micturition and the ejaculation of the spermatic 



