122 NEW YORK ZOOLOGICAL SOCIETY. 



Iliac Artery in a Zebra. — On j\Iarch 27 the Grant zebra mare de- 

 livered a dead foal, which apparently had been carried the full 

 gestation period. Soon afterward she began gradually to fail in 

 health without presenting any acute or marked symptoms of 

 disease. Notwithstanding a remarkably good appetite, she grad- 

 ually declined, exhibiting emaciation and weakness. Atrophy 

 was most prominent in the hind limbs. During the summer she 

 was transferred to and allowed to range in the buffalo pasture, 

 where besides grazing she was fed daily with grain and hay. Xo 

 improvement was noted in her condition, but it was noticed that, 

 especially after slight exertion, there was a trembling of the 

 hind limbs. This, however, would disappear after resting a 

 little while. 



After showing intermittent attacks of lameness in the hind 

 limbs for several weeks, she was found dead in the pasture on 

 October 10. On post-mortem examination the pelvic and ab- 

 dominal cavities were found to contain a great amount of blood. 

 The muscular and connective tissue of the left leg was deeply 

 infiltrated with blood, and the hemorrhage was traced to the 

 internal iliac artery, which was foimd to contain a very large 

 attached thrombus near its aortic bifurcation. The artery at this 

 point was greatly dilated, exhibiting a large saculated aneurism. 

 The blood vessel was markedly degenerated, and the thrombus 

 filled the entire lumen of the vessel. The thrombus was strati- 

 fied, and pale in color ; the rupture of the artery irregular and 

 ragged in appearance. Besides the condition already noted, the 

 i;terus showed a chronic inflammation apparently of some months' 

 standing. 



Parasitic Diseases. — There were fewer deaths from intestinal 

 parasites than in any previous year. The systematic microscopic 

 examination of the fecal discharges of new arrivals, for the 

 presence of the ova of the different intestinal parasites, has been 

 of great value in directing the proper medication to be carried 

 out before these parasites could set up a serious gastritis or 

 enteritis. 



Tape-Worm Cysts. — Deaths from this troublesome disease have 

 been mentioned among our American deer and antelope each 

 year, but during the past year not a single case is to be recorded. 

 Since these animals have been cut off from their large grazing 

 ranges — which were imdoubtedly infected — and placed in large 

 macadamized corrals, where all the food is under the absolute 

 control of the keepers, these tape-worm cysts have gradually 

 <lisappcarc(l. 



