PARASITES OF ANIMALS. 67 
NEMATODES. 
Ascaris megalocephala Cloquet. Small intestine ; common. 
Oxyuris curvula Rudolphi. Colon, cecum, rectum ; common. 
Eustrongylus gigas Diesing. Kidney, etc. 
Sclerostoma equinum Blainv. Duodenum, colon, ccecum, pan- 
creas, Sometimes very numerous, and in enlargements of 
the arteries; common. 
S. tetracanthum Diesing. Duodenum, ccecum, colon. 
Strongylus micrurus Mehlis. Trachea and bronchial tubes. 
Filaria microstoma Schneider. 
F. papillosa Rud. Abdomen, thorax, brain, eye, intestine. 
F. lachrymalis Gurlt. About the eyes, in lachrymal ducts, etc. 
Spiroptera megastoma Rud. Tubercles in stomach. 
Dracunculus medinensis Cobbold. (Guinea-worm). Subcu- 
taneous tissues ; only in tropical parts of Africa, Asia, and 
America. 
ACARINA. 
Pentastoma tenioides Rud. Nasal cavities, larynx, etc. 
The mule and ass are subject to the same parasites as the 
horse, but not to the same extent. The number of species 
hitherto observed is less, and they are far less common. 
INTERNAL PARASITES OF THE HOG. 
CESTODES. 
Tenia solium Linn. In the larval or cysticurcus state in the 
abdominal viscera. 
T. marginata Kiich. Cysticercus state inthe abdominal viscera. 
T. echinococeus Siebold. Hydatid state in liver, etc.; not 
common. 
TREMATODES. 
Fasciola hepatica Linn. Liver and bile ducts. 
Distoma lanceolatum Mehlis. Bile ducts. 
ACANTHOCEPHALA. 
Echinorhynchus gigas Goeze. Small intestine ; common. 
NEMATODES. 
Trichina spiralis Owen. Mature in intestine, young in mus- 
cles ; common. Digitized by Microsoft® 
