THE H^MOSPORIDIA 



385 



staining more deeply, on which the pseudopodia are centred ; arid a smaller, 

 paler body placed more excentrically. In the pear-shaped forms the large, 

 dark nucleus is placed at the blunt end, the small, pale body near the pointed 

 end. Forms similar to these have been obtained in cultures, and evidently 



H 



Fia. 162. Stages in the development of Piroplasma in the tick. A G, Amoeboid 

 forms (gametes ?) : A, pear-shaped, with the pseudopodia given off at the 

 thicker end of the body ; B, G, spherical or Heliozoon-like, with the pseudo- 

 podia radiating out on all sides ; D F, fusion of the gametes (?) ; G, result 

 of fusion (?) ; H J, globular bodies (zygotes ?) ; K M, motile vermicules 

 (ookinetes ?). AJ after Koch (P. bovis) ; K M , after Christophers 

 (P. canis). 



represent the first stages of the development ; but they appear to have been 

 missed by Christophers, unless it is to be assumed that these forms occur in 

 P. bovis, and not in P. canis. 



The star-like forms would appear to represent the gametes ; they congregate 



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