11 



of intestinal parasites in the course of ;irute infectious fevers 

 is by no means an uncommon occurrence; it is thought to 

 !>< possibly due to a deleterious action of the toxins of the 

 disease u|K)ii the parasites, causing iheni to lose whatever 

 attachment (hey may have had to the intestinal wall, or 

 weakening or killing them and thus permitting them to be 

 swept with the discharges from the canal. Some years ago 

 a similar experience was met by the writer in the case of a 

 young man who was known, from the discovery of the ova in 

 his stools, to !M> the host of I'lirinarid amerieana, Stiles. The 

 ova had Ix-en repeatedly observed in the feees until an attack 

 of smallpox intervened. Shortly thereafter, and continuously 

 from the time of the variola, no more ova could be detected 

 in the excrement, the presumption being that the parasites 

 had l>een lost during the febrile period. 



29. A/trarix rquorum, Goeze (=A. Tnegalufi ji/m/n, Cloquet), 

 was met twice in the present series, once (Path. Hist., 775) 

 passed in the dejecta of a Burchell zebra, Equus burchelli, 

 in the collection of the Zoological Gardens, and the second 

 specimen picked up in the street by one of the medical 

 students, Mr. O. H. P. Pepper, where, doubtless, it had been 

 deposited by some passing horse. 



30. Axctiri.t canis, (Werner) (= A. myslax, Zeder), has 

 been repeatedly met in the intestines of dogs used in experi- 

 mental work in the laboratory (Path. Mus., 33); was referred 

 in one instance (Path. Mus., 14) by Dr. J. J. Repp from a 

 dog in Iowa; was found (Path. Hist., 1447) in the intestine 

 of a chow-dog, the hairless Chinese dog, Canis domesticus 

 xincnsis (P. Z. G., 1015); and in large numbers from the 

 intestine of a puppy which died in the veterinary hospital 

 of Dr. Horace Hoskins, in this city. 



It is generally accepted that the examples of this type of 

 worm met in cats are identical; although it is true that minor 

 differences have been noted and that the feline specimens 

 are often spoken of as constituting a separate variety, A. 

 canis, var. cati. In the list of laboratory studies specimens are 

 recorded from the domestic cat, Felis catu$, from Texas 



