PHYSICAL AND LITERARY. 207 



the cellular membrane, we perceived a 

 good deal of extra vafated blood, and 

 found fome more of the fame in the ad" 

 joining parts of that membrane, extend- 

 ing to the pelvis, and to the left fide, be- 

 tween the peritonaeum and abdominal 

 mufcles. In order to the better examina- 

 tion of this fubftance, it was taken quite 

 out of the body, together with fome pare 

 of the aorta above, and the iliacs below. 



. Having laid open that part of the aorta 

 the whole length of the tube, we obfer- 

 ved a compleat rupture of all its coats, 

 upon the left fide of the vefiTel, between 

 the emulgents and lowed mefenteric ar- 

 tery. This aperture had lacerated edges, 

 was large enough to admit the difiedor's 

 thumb, and led into the tumour, which 

 now appeared to be a fpurious aneurifm 

 of the great artery ; that is, a fac form- 

 ed of the cellular membrane, containing 

 fome blood of different degrees of coagu- 

 lation, which, apparently, at different 

 times, had iffued from the aorta. That 

 portion which lay next the artery was as 



, firm as what is found in aneurifms of a 



year's 



