434 



VAEIX. 



one jugular vein, there is only a greater tendency to megrims 

 irom pressure by the collar. 



VAEIX. 



Usually at the seat of repeated blood-lettings, but sometimes 

 in other parts of veins, the coats, the latter become attenuated 

 and pressed out by the blood. It is usually in the hind ex- 

 tremity that these venous dilatations or varices are noticed, 

 and they may affect one vein or many. A cab horse ap- 

 peared daily for several years on a stand in Princes Street, 

 Edinburgh, in which the superficial veins of the off hind-leg 

 and flank were enormously varicose. A rich network of 

 varicosities was seen, especially when the animal had been 

 driven briskly. I could learn nothing of the history of the 

 case, and the varices would probably be due to some internal 

 cause of interference with the blood's flow. The most in- 

 teresting case of varix as occurring in the lower animals yet 

 published, appeared in the second volume of the Edinburgh 

 Veterinary Review. Mr Hunt of Birmingham says : 



" In 1856, my attention was drawn to a six-year-old black cart geld- 

 ing, the property of Mr Thomas Oakley. On the internal and anterior 

 part of the near hock, nearly in the position of so-called l bog-spavin,' 

 I found a fluctuating tumour, not larger than a hen's egg. Inclining to 

 the opinion that it was of bursal nature, I recommended, after cursory 

 examination, that it be left alone. In tendering this advice, I was 

 acting on the conviction that, at least for a long time, the animal's use- 

 fulness would not be interfered with by the tumour referred to. As the 

 sequel will prove, this conviction was well-founded, notwithstanding 

 that, upon more careful examination, I was led to form a diagnosis at 

 variance with my first impression. The animal did not come under my 

 observation again for some time, probably two years. I then found 

 that the tumour had nearly trebled its size, was broad at the base, and 

 somewhat pointed at the surface, in size and shape comparable to a 

 large pear, with its base in apposition to the inner surface of the hock. 

 I now entertained a suspicion that the tumour was a varix, due to dis- 



