APPENDIX. 



353 



more pointed than the posterior, and gradually fining off 

 into the lash. When the body seemed to rest, the lash 

 might be seen to whip out in all directions. As the 

 movement of the body gradually diminished, it appeared 

 to have a complicated screw-form, the axis of the screw 

 corresponding to the body, to which an undulating mem- 

 brane is fastened spirally. This could be distinguished 

 when the organism was dying, because the body in death 

 contracted, and the membrane then looked like a spiral 



FlG. 130. H^EMATOMONAS COBITIS. 

 ff t First variety ; d, second variety ; c, third variety. 



d, First variety in a state of diminished activity. 



e, The same after treatment with osmic acid. 



[After Mitrophanow.] 



addition. Thus the organism consisted of a body, a 

 spiral membrane, and a flagellum. 



With higher magnification the organism appeared to 

 consist of a refractive, strongly-contractile, protoplasmic 

 substance, which, when death occurred, formed a shape- 

 less mass. In the same blood two other forms were 

 observed, one without a membrane, but having two highly- 



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