MAMMALIA. 



229 



FIG. II. 



THE HYPOGASTRIC PLEXUS OF THE SOW. 



(SUS SCKOFA.) 



1. GANGLION of the aortic plexus. 



2. Internal spermatic nerve, passing with the spermatic artery in the broad 



ligament to the ovary, the fallopian tube, the round ligament, and superior 

 part of the uterus. 



3. Hypogastric plexus ; it gives off the uterine nerve and a smaller branch ; it 



passes down and is joined by branches derived from a large branch of the 

 second sacral nerve, which has been joined by a branch of the first ; it then 

 gives branches to pass with the inferior uterine artery to the neck of the 

 uterus, and communicate with the uterine nerves, whilst the rest terminate 

 on the bladder, vagina, and rectum. 



4. Uterine nerve; it ramifies with branches of the large uterine artery and 



veins in the broad ligament, like the mesenteric nerves and vessels, to be 

 distributed on the long horn of the uterus ; a smaller branch is also ramified 

 in the broad ligament. The ramifications of the uterine nerve near the 

 uterus could not be distinctly seen without a magnifying-glass, and, as this 

 engraving is about a fifth part of the dimensions of the drawing, they are 

 of necessity made larger than they exist in nature. 



5. First sacral nerve. 



6. Internal pudendal nerve. 



