The Eggs and Larvae of Horse 
Parasites 
I N general the parasites infesting horses infest asses and mules also. 
Horses are infested with three species of tapeworms, all of them 
having heads which are not provided with hooks and all of them 
Fig. 40. Anoplocephala perfoliata. Egg. x 360. From Yorke and Southwell, 1921. 
occurring in the United States. The eggs of the tapeworms are 
provided with a piriform apparatus such as was described in the 
previous paper on eggs and larvae of ruminant parasites. The egg of 
Fig. 41. Schistosoma indicum. Egg. Enlarged. From Skrjabin, 1913. 
Anoplocephala magna is described as oval, round or polyhedral, and is 
about 88 microns long by 50 to 60 microns wide. The egg of A. 
perfoliata (Fig. 40) is approximately spherical and is 65 to 80 microns 
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