386 



LECTURE XVI. 



therefore the same primitive fasciculus, is, as it pursues 

 its course, now in a state of degeneration, now preserved 

 in all its integrity ; the other form in which the disease 

 sweeps along the primitive fasciculus, and this undergoes 

 the change in its whole extent at once, and where there- 

 .fore normal and degenerated fasciculi lie side by side, 

 and may alternate with one another. 



Here is another specimen from a young female (who 

 died shortly after menstruation in consequence of a burn) 

 in which you will find a very beautiful corpus luteum in 

 the ovary. I lay it before you because you will be able 

 to see, from it, how obviously fatty metamorphosis may 

 display itself to the unaided eye. The incision into the 

 ovary has been made perpendicularly to the surface, at a 

 point where a little prominence and slight rent upon the 

 surface mark the place at which the ovule has emerged 

 (Fig. 115, B). From the point in the tunica albuginea 

 where the follicle has burst, the very broad, yellowish 



FIG. 116. 



white layer (Fig. 115, A, Z>), from which the body derives 

 its name, is seen running around a red mass. It is this 



Fig. 115. Formation of corpora lutea in the human ovary. A. Section of an 

 ovary : a, a follicle recently burst and filled with coagulated blood (extravasation, 

 thrombus), and around it the thin yellow layer ; 6, a follicle, which had burst at an 

 earlier period, already corrugated, and provided with a diminished thrombus and 

 thickened wall ; c, d a still more advanced stage of retrogressive metamorphosis. 

 B. External surface of the ovary, with the fresh rent caused by the bursting of the 

 follicle, from the cavity of which the thrombus is seen peeping out. Natural size. 



