ANIMAL MICRO-PARASITES. 



Surra are only associated with the disease, the impm-ei-Mied Mood 

 affording a suitable nidus for their development, while tin- con- 

 taminated water may be the common source of tin- I f 



the disea.-e. On the other hand, the organism in the rat i- t<>und in 

 apparently perfectly healthy, well-nourUhed animal*. The author 

 suu-^sts that the parasites observed in the rat and liam>ier -hould 

 be named after Lewis, Trichomonas Lewisl; the organism in th- 

 mule, camel and horse after its discoverer, TricJumwnas Evan*i\ 

 and that the names Trickomonas cobitis and Trichvmonaa carasni 

 should be substituted for the names of the species described by 

 Mitrophanow. Thus we should have added provisionally to the 



Genus TRICHOMONAS. 



Sub-genus Trichomcmas sanguinis. Defi n i t ion : Elongated 

 tapering bodies, provided with a spiral (T. cobiti*), or 

 longitudinal (T. carassii, Lewiai, Evansi] ..... mbrsne, ter- 

 minating in a rigid filament and an anterior flagelhim. 

 Highly polymorphic. Habitat, the blood. 



Species. Trickomows cobiti* (//.i,,.-if"numM < 



Mitrophanow) Mud -li>h. 

 Tr'.chomonaa carassii (Hcematonwnas carateii 



Mitrophanow) Carp. 

 Trickomona* Lewisi (Htrpetomoruu Lewi* 



Kent) Rat, ham 

 Trichomonas Evansi(^ I''* 



Steel) Horse, mule, rum-l ; (pathogenic ?). 



H^MATOZOA OF THE FROG. 



Tankester described an organism whirl. l. h'l 'H-verod n, 



.-- 



" ; 



