382 LECTURE XV. 



the mixture of sejbaceous matter and epidermis pro- 

 duces a pultaceous mass. What we find in the arteries 

 is a mixture of fatty debris with softened intermediate 

 substance ; and, since the fatty mass is shut off, a kind 

 of enclosed deposit results as it were an abscess. It 

 is only after the softening has proceeded to some extent 

 that the surface gives way, and matters issue from the 

 cavity into the vessel, whilst others proceed from the 

 blood into the cavity. 



In this manner destruction, demolition, ulceration is 

 produced, and ultimately the atheromatous ulcer, a species 

 of ulcer very nearly allied to the ordinary forms of ul- 

 ceration, but indebted for its origin to fatty metamor- 

 phosis alone. It is a product of the [atheromatous] 

 deposit, but it no longer contains any formed elementary 

 parts. Cholestearine indeed may still be set free, but 

 we have really and truly to deal with a destructive and 

 ultimately ulcerative process. It is only in those parts, 

 in which, as in the mammary and sebaceous glands, there 

 is a succession of new cells, that the process of fatty 

 metamorphosis can continue for any length of time 

 without leading to such an annihilating result. But, 

 even in these instances, the different cells affected ulti- 

 mately perish and break up, as in the really fatty de- 

 generation. 



