THE ORGANS OP THE MIDDLE GERM-LAYER. 



395 



degenerating vascular glomeruli (mk]. Certain canals and cyst-like 

 structures, which are often found in the broad ligament of the adult 

 close to the uterus, are to be referred to it. 



The two Miillerian ducts (fig. 219 my}, which from the beginning 

 lie in the margin of the peritoneal fold that serves for the reception 

 of the ovary and subsequently becomes the broad ligament, undergo 

 a very profound metamorphosis. It has already been mentioned 

 that as they enter the lesser or true pelvis they approach the median 

 plane, and are joined to the genital cord. We can therefore dis- 

 tinguish in them two different regions, one enclosed in the genital 

 cord, the other lying in the margin of the broad ligament. The 



Fig. 227. -Broad ligament with ovary and oviduct in the adult condition, seen from behind. 



d, Ovary ; t, oviduct ; t', ostium abdominale tubse with firubriae ; f.o, fimbrise ovarii ; l.o, liga- 

 mentum ovarii ; x, a portion of the peritoneal investment is dissected away, in order to see 

 the epoophoron (parovarium), ep. 



latter becomes the oviduct (the tuba Fallopise) with its funnel-shaped 

 beginning (figs. 225 t, 226, 227 t, t'). The anterior end of the 

 Miillerian duct, which in the embryo reaches far forward and is 

 here enclosed in the diaphragmatic ligament of the primitive kidney, 

 appears in the meantime to degenerate, whereas the permanent 

 opening (figs. 225 Zand 226 t') is probably an entirely new formation. 

 MORGAGNI'S hydatid (fig. 225 %) is perhaps to be referred to the 

 anterior rudimentary part the conditions here have not yet been 

 made entirely clear. This structure is a small vesicle, which is joined, 

 by means of a longer or shorter stalk, with one of the fimbrise of the 

 funnel-shaped end of the oviduct. 



Out of the part of the Miillerian ducts enclosed in the genital 

 cord (fig. 219 mg) are formed the uterus and the vagina (fig. 225 ut 



