336 PROCEEDINGS OF THE ACADEMY OF [NoV., 



With regard to the shape of the paired parasites, they were either 

 approximately round or approximately piriform. Of 741 cases 

 noted, in 406 the parasites were round, in 335 piriform. It 

 may be mentioned, however, that the parasites found in smears of 

 the organs made post-mortem are always smaller and rounder than 

 those in smears made from the peripheral blood of the living cow. 

 To the best of my knowledge, the only author who has emphasized 

 this fact is Theobold Smith. 



