280 PURPURA H/EMORRHAGICA. 



the jelly-like exudate, marking the underlying muscular tissue. 

 This exudate does not, in the depositions of longest duration, 

 show any disposition to fibrillate or become organized. In 

 some instances these local cutaneous swellings, in addition to 

 the peculiar colloid or jelly-like and coloured exudate, have 

 true extravasation of blood as blood ; and this, when so met 

 with, possesses the characters already spoken of, excessive 

 tenuity, altered state of the red corpuscles, and indisposition 

 to form coagula. 



In the greater number of cases of the ordinary type, next to 

 the 'obvious changes in the blood and general connective- 

 tissue, the most striking are those pertaining to the great 

 serous cavities and structures. Petechicie, vibices, and larger 

 blood-markings are observed on the peritoneum, sometimes on 

 the pleune, more often on the peri- and endo-cardium, and 

 occasionally on the membranes of the cerebro-spinal centres. 

 In the cavities with which these several membranes are 

 related we have also not unfrequently a considerable quantity 

 of a more or less highly coloured fluid, the quantity varying 

 with the obvious extent of the tissue-changes which the 

 structures have undergone, particularly with the extent of the 

 blood-markings or extravasations into the subserous struc- 

 tures. 



In some instances there is, in addition to the blood-markings 

 on the visceral layer of these membranes, a collection of the 

 characteristic coloured gelatiniform exudate found so largely 

 in other situations. This is oftenest seen connected with the 

 kidneys and heart. 



The mucous tract of the elementary canal, particularly in 

 the intestinal portion, may show scattered ecchymoses or 

 larger blood-stainings, and more rarely in the ordinary cases 

 turgcscence of the mucous membrane, from infiltration into 

 the submucous connective-tissue. When during life we have 

 had much abdominal pain, either with or without blood being 

 mingled with the natural discharges, free blood will be found 

 in the canal, or the faecal matter and ingesta extensively 

 coloured, from admixture with blood or blood-products. 



The glands of the mesentery, as might be supposed from 

 their connection with the process of assimilation, are visibly 

 altered in character ; they are enlarged, somewhat changed in 



