PARASITES OP ANIMALS. 67 



NEMATODES. 



Ascaris megalocephala Cloquet. Small iiitostine ; common. 



Oxyuris curvula Riidolphi. Colon, coecum, rectum ; common. 



Eustrongylus gigas Diesing. Eadnej, etc. 



Sclerosfoma equinum Blainv. Duodenum, colon, coecum, pan- 

 creas, sometimes reiy numerous, and in enlargements of 

 the arteries; common. 



S. tetracanilium Diesing. Duodenum, coecum, colon. 



Strongylus micrurus Mehlis. Trachea and bronchial tubes. 



Filaria microstoma Schneider. 



F. jjapillosa Rud. Abdomen, thorax, brain, eje, intestine. 



F. lachrymalis Gurlt. About tlie eyes, in lachrymal ducts, etc. 



Spiroptera oneg-asfoma Rud. Tubercles in stomach. 



Dracunculus medinensis Cobbold. (Guinea-worm). Subcu- 

 taneous tissues ; only in tropical parts of Africa, Asia, and 

 America. 



ACARINA. 



Pentastoma tcenioides 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 OP THE HOG. 



CESTODES. 



Tcenia solium Linn. In the larval or cysticurcus state in the 



abdominal viscera. 

 T. marginata Kiich. C^5^2cgrcMS state in the abdominal viscera. 

 T. echinococcus Siebold. Hydatid state in liver, etc.; not 



common. 



TREMATODES. 



Fasciola hepatica Linn. Liver and bile ducts. 

 Distoma ZawceoZaiwm Mehlis. Bile ducts. 



ACANTHOCEPHALA. 



Echinorhynchus gigas Goeze. Small intestine ; common. 



NEMATODES. 



Trichina spiralis Owen. Mature in intestine, young in mus- 

 cles ; common. 



