360 
T. F. WINCHESTER. 
Owing to these facts, it has been necessary for me to of 
tain the greater part of the literature from continental author? 
Finding that to be the case, I have had the able assistance c 
Dr. J. M. Parker, of Haverhill, in order that a part of th 
investigation may be original work. To him we are indebte- 
for several original drawings, the enlarged plates from Net' 
mann, mounted specimens, revised description of the parasite 
besides several post-mortem reports of horses that had lesion 
due to this nematode. 
At this point it might bb well to state that in man, accord! 
ing to Prol. W. F. Whitney, of Harvard Medical School 
aneurisms have never been found due to a nematode. 
a» I 
STRONGYLUS ArMATUS. I 
Synonyms .—Armed Sclerostome ; Sclerostoma equinum 
Palissade worm ; armed Strongyle. 
This parasite is a nematoid of the genera strongylus. Th<; 
term “ nematode ” derives its origin from the Greek wore 
“ nema, signifying “ a thread”; the term strongylus mean 
ing round or cylindrical. 
History. 
A knowledge of these parasites goes back to the seven 
teenth century. In 1655> Ruysch discovered in an aneurisn 
of the mesenteric artery of a horse an innumerable quantity 
of small worms, and later he published three or four similai 
observations. Schultze, in 1725, Chabert, in 1782, recorded 
similar instances, and since then such observations have beer 
greatly multiplied, principally by Rudolphi, Hodgson, Greve 
Rigot and many others, including English and American vet¬ 
erinarians. Bollinger has made an attentive study of this 
parasitism, and in following it out has definitely established 
its essential points. These verminous aneurisms have only, 
been found in the equidas, and, according to Neumann, more 
frequent in the ass than in the horse. 
Hering asserted that, except in young foals, it is rare to 
find a horse without aneurismal dilation, and Bollinger esti¬ 
mated that from ninety to ninety-four per cent, of adult 
