TRICHOMONAS MURIS 



665 



body of the flagellate elongates the two daughter axostyles finally occupy 

 a straight line between the two blepharoplasts. This is the line which 

 would be occupied by the paradesmose if it persisted, and this has given 

 rise to the view that the axostyles are really derived from the paradesmose, 

 and that the old axostyle had disappeared. The writer (1907) came to 

 the conclusion that the paradesmose had disappeared before this stage, 

 and that the structure uniting the blepharoplasts at the final stage of 

 division was formed by the longitudinally divided axostyles. This view 

 was supported by the observations of Kofoid and Swezy (1915a) on 



Fig. 273. — Trichomonas anfjiista from the Frog, Bnna hoi/lei : Plasmodium Phase 

 WITH Eight Nuclei and Four Axostyles (x 2,175). (After Kofoid and 

 SwEZY, 1915.) 



T. inuris, T. augustci, and other species (Fig. 272). Dobell(1909) came to 

 the conclusion, however, that in T. batrachorum of the frog the axostyles 

 of the daughter fiagellates arise from the paradesmose. On the other 

 hand, Kuczynski (1914), from a study of T. niuris and other species, 

 maintains that neither view is correct, and that the old axostyle disappears, 

 while new axostyles are formed as outgrowths from the blepharoplasts, 

 and arise like the new basal fibre. Martin and Robertson (1911), from a 

 study of T. eherthi of fowls, could arrive at no definite conclusions as to 

 what happened. Wenrich (1921), from a study of T. vuiris, finds himself 



