ANEURISM OF THE ILTAC ARTERY. 223 



internal coat was ulcerated where the ossific process had 

 taken place, and a clot completely blocked the dilatation, 

 and the posterior divisions of the aorta as well, and extended 

 even to the origin of the renal arteries. The membranes 

 of the spinal marrow were also highly inflamed above the 

 lumbar region; and the marrow itself was softer than 

 natural, and covered with bloody spots. 



The subjoined case occurred in 1826 at the College at 

 Alfort : 



A mare was brought in very lame from a sinus in the 

 foot, perforating the long flexor tendon, which was treated 

 for three weeks; when one day, while the foot was being 

 dressed, the mare suddenly reeled about, threw up her 

 head, and fell down. No sooner was she down than her 

 nostrils and chest and belly and flanks were all in con- 

 vulsive action for breath ; her limbs became stretched, and 

 her eyes rolled in their orbits. The jugular was opened 

 instanter ; but drops of blood only issued. In this very act, 

 death closed the scene. The pericardium was found pro- 

 digiously distended with coagulated blood, looking at first 

 like hypertrophy of the heart. This coagulum weighed five 

 pounds. The trunk of the aorta was extensively ruptured 

 at its base, and the lesion was evidently the result of 

 attenuation of its coats. 



ANEURISM OF THE ILIAC ARTERY. 



The late Mr. King, V.S., Stanmore, showed me a dried 

 preparation — a specimen of an aneurismal tumour, communi- 

 cating, as it seemed to him (for there was much confusion of 

 parts), with the external iliac artery; if not with that, with 

 the gluteal. The aneurismal sac was composed principally 

 of the parts immediately adjacent. In several places it had 

 become ossific : indeed, so large and evidently spreading 

 were some of the patches of osseous matter, that, had the 

 animal survived any great while longer, there is httle doubt, 

 ultimately, the whole sac would have become converted into 

 bone. The history of the case was — A horse, not worth 



