APPENDIX. 



infusoria between the genera Cercomonas and Trichomonas, 

 with great similarity to the Trickomonas described in the 

 Lieberkiihn's glands of fowls and ducks (Eberth*). 



On account of their special habitat Mitrophanow 

 suggested a new genus (Hcematomonas), defining this genus 

 as follows : Parasites of normal fish-blood, worm-like, 

 actively-moving organisms, with indistinct differentiation 

 of body parenchyma. Bodies pointed at both ends, 30 

 to 40 ju, long and i to 1*5 /A wide. May possess in front 

 a flagellum, and on one side an undulating membrane. 



Species : 



Hczmatomonas cobitis. Body provided with a spiral 

 membrane and a flagellum at the fore-end. Parenchyma 

 of body homogeneous. Second variety, body and flagel- 

 lum only. Movement undulatory, body containing highly 

 refractive spherules. Third variety, plasma-like body, 

 without membrane or flagellum ; quickly changes form by 

 sending out processes laterally, and contains two to four 

 refractive spherules. Blood of Cobitis fossilis. 



Hczmatowonas carassii. Long bodies, with narrow 

 membrane attached along the whole length ; less actively 

 motile. Several forms also observed strikingly smaller 

 than the above ; many disc-shaped. Often seen attached 

 to a red corpuscle, setting them in motion by their move- 

 ments. Blood of Cyprinus carassius. 



Quite recently the author has investigated the parasites 

 found in the disease known as Surra, and came to the 

 following conclusions : 



In stained preparations the somewhat tapering central 

 portion, or body, of the parasite is found to be continuous 

 at one end with a whip-like lash, and at the other end to 

 terminate in an acutely-pointed stiff filament, or spine-like 

 process. Here and there, possibly from injury or want of 

 development, the spine-like process appears to be blunted 



* Vide Leuckart, The Parasites of Man, translated by Hoyle, 

 p. 248. 



