1023] 



Kofoid-Swezy: Pentatrichomonas ardin dcJtrUi 



:{79 



blepharoplasts and a centrosome. It is possible that the granule at 

 the base of the clustered flagella may be subdivided, or that there 

 may be a granule at the tip of the axostyle, bvit we have been unable 

 to find clear evidence of more than two blepharoplasts with the 

 relations as above defined bv us. 



Pig. A. Pentatricliomonas ardin delteili. X 3200. From stained preparation 

 of human stool. Abbreviations: ax., axostyle; cent., centrosome; clu^t. ant. fl., 

 clustered anterior flagella; cyt., cytostome; food vac, food vacuole; ind. ant. fl., 

 independent anterior fllagellum; marg. fil., marginal filament: kary., karyosome: 

 nvc, nucleus; mic. rhis., nuclear rhizoplast; par. b., parabasal body; post. fr. fl., 

 posterior free flagellum; prim, bleph., primary blepharoplast ; rhi:., rhizoplast; 

 sec. lileph., secondary blepharoplast; i(nd. memb., undulating membrane. 



The two blepharoplasts are joined by a very short rhizoplast and 

 the proximal one is connected with the centrosome {cent., fig. A) on 

 the nuclear membrane by a, definite rhizoplast (rhiz., fig. A). 



The centrosome (cent., fig. A; pi. 37, figs. 1, 2, 7) is a small, deeply 

 staining granule on the anterior surface of the nuclear membrane 

 in close juxtaposition to the blepharoplasts. At certain stages of 

 mitosis an intranuclear rhizoplast (pi. 37, fig. 10) may be seen to 



