AMMAL MICKn-l'AKAH (;,,] 



blood of a field mouse, and he aim ,,,,.,,ti,,iis that OhMHOU U.nd 

 minute " nematodes'' in the Hood of a Mark rat. 



Wittich discovered in the blood ,,t tuunaten whip-like l^li,-, with 

 lively movements. They resembled frog, ^enn.w.oa, po*e> 

 a thick portion continued into a long lash-like thread. 

 considered them identical with the organi.M,,, dnerfbed 

 they also were observed in apparently healthy animal,. " K.H h ! 

 met with the same organisms. 



Like Lewis, the author found that the Mood of th. 

 brown rat in England appeared to quiver with life, and that tfee 

 parasites were extremely difficult to examine until their inmen 

 was arrested for a moment or they became imprisoned in the serum 

 areas. After examining with various powers, from a ! d,\ 

 to a 2^5 o. i. of Powell and Lealand, the author came to th,- 

 following conclusion : That they are polymorphic, preKen 



O 



FIG. 240. A MONAD ix RAT'S BLOOD. The organism is n- presented t j*rtial 

 rest with its posterior filament impinging on a corpuscle, and Knowing the 

 undulating longitudinal membrane, the long flagellum, and the refractive 

 spherules in the granular protoplasm ( x 3000). 



the most part slightly tapering bodies which terminate at one end in 

 a stiff, immotile, acutely-pointed flexible filament or spine-like prooeH, 

 and at the opposite end are provided with a long Hagellum, while. 

 longitudinally attached, a delicate undulating fin-like membrane can 

 be traced, which starts from the base of the pu>t.'rior filament, and 

 becomes directly continuous with the fla^ellnm (Fig. 



With careful illumination the Udy i> t'"'nd to be di>tinrtly 

 granular, with one or more highly-refractive hpherule>. \\li.-n th-- 

 rapid movement is arrested the undulating m.-ml.r -\\n-\\\ 



visible. The best opportunity . whi-n th- 



organism comes to paitial re>t with it- >titV fil.un.-ni 

 corpuscle, as if to obtain a point (Tappiti, while : flag.-llum 



in all directions (Fig. :M1, 1). At other time,, wh.-n the iinudtehiw 

 imj >inged with its posterior extremin 



stiff filament is apparently entangled in '//////x. tin- movement* of 

 the organism give one the idea of it, n.d. -^..uring to ^^ ithelf 



