BY JAS. P. HILL. 47 



tei'ms this the " Ligamentum vesicse medium." From each side 

 of the bladder there passes down a low ridge-like fold represent- 

 ing the obliterated hypogastric artery, much more strongly 

 developed in Macropus, which proximally conveys the vesical 

 artery and vein from the urogenital fold to the bladder. 



"Vessels. 



The vesical arteries arise together with the internal iliacs from 

 the aorta. They (fig. 1, ves.v.) pass in the lateral urogenital fold 

 of peritoneum to divide into branches supplying the bladder, the 

 lateral aspects of the uteri and vaginal ca^ca and the urogenital 

 strand. The vesical veins join the iliac veins just before they 

 unite to form the inferior vena cava. 



The spermatic (ovarian) arteries arise separately from the 

 dorsal aorta, the right in front of the left. They pass back to 

 suppl}^ the ovaries, Fallopian tubes and anterior ends of the uteri. 



Ovaries- 



The ovaries (Plate i., fig. 1. oi\) are usually compressed oval 

 bodies, with, except in young females, grooved and tuberculated 

 surfaces. The Graafian follicles are small and do not project 

 prominently, while the corpoi'a lutea, when present, form pro- 

 minent swellings 25 to 3 mm. in diameter. The ovai'ies have a 

 maximum length of about 6 mm., and a breadth of about 3-5 mm. 

 As before mentioned, they lie enclosed together with the fimbriated 

 openings of the Fallopian tubes in peritoneal pouches formed by 

 the broad ligaments. The pouches lie dorsal to the uteri and 

 open posterioi'ly by wide apertures into the dorsal uterine fossa. 

 In the natural position of the parts, the o^'ary is situated in its 

 peritoneal pouch about opposite the mid-region of the body of the 

 uterus (either just above the dorso-lateral surface of the same or 

 quite external to it) and almost immediately above the round 

 ligament. Its long axis may be directed either transversely, 

 longitudinally or obliquely, the direction of the axes of the ovaries 

 even varying on the two sides of the same individual. Each 

 ovary has a broad usually oblique attachment to a thickened area 



