IXODIC AN.EMIA — TEXAS FKVER, ETC. 



Phot o-Micro(j )•(( p]i>i of the Hccmatowon in. various star/es. 



Fig. 25j. 



■<.J 



cr. 





"Vr 



Blood of Ox, showing wliat ivsembles the mature stage of tlie Frotozooii I'lji'^uiad hUjimi nnni. 

 This flagellatt! .stage must be rarely reached in cattle, for there are very few .seen in the 

 siieciniens ; but they luay probably be more numerous in acute cases, none of which were seen 

 Ijy me. The plate shows various stages of the disintegration of the monad, which seems 

 extremely liable to break up after removal from the boily. (Indeed this flagellate stage 

 is believed by some to be one of degeneration.) The American observers seem evidently to 

 have failed in successfully studying this stage, excej)! in jierfectly fresh blood, and reconuiiend 

 observations \\\m\\ it to be made in the tielil. That in the lowermost position in the plate shows 

 a mere trace of the shrunken tiagella witli cunsiderable altei-ation and shrivelling of the central 

 l)ortion ; the others in the plute, particulaily that on the right hand, appear to be still further 

 degradations of the luature form ; Uic i-mlral dark spots in the liguiTs are purely optical, and 

 do not represent nuclei. The tiagella. seru in \\\r ecntial li.mirr. lieing long In jinipurtioM to the 

 microscopic power used, cannot be repri'senlrd in Incus ihnjughoul llic whole length in a 

 photograph, as they are not all on one plane. It "ill he dillieult U> establlsli the identity of 

 this stage without further extensive ohservalinns on Texas I^'ever, as well as uj)on the disease 

 Surra, seen iu the horse in Inilia. (8ee Sunv.) 



