CONCLUSIONS 219 



under categories to which the author guesses they belong. 

 Asterisks refer to kinetosomal attachment, as will be explained 

 below. Exclusively intranuclear fibers are not included. 



1. Banded fibrils, exhibiting a period of 30 to 60 my and varying greatly 

 in width; possibly made up of bundles of periodic filaments in phase. 



*Rhizoplasts or other flagellar root fibrils of phytoflagellates : 

 Chromulina psammobia, Synura caroliniana, Paraphysomonas 

 vestita, (Chrysochromulina ericina), (Micromonas squamata), 

 Pedinomonas tuber culata. 



* Costa of Trichomonas, Tritrichomonas. 



*Parabasal fibrils of Tritrichomonas, Trichomonas, Foaina, 

 Trichonympha. 



* Axial ribbons of Pyrsonympha, Joenia. 



*Kinetodesma of Paramecium, Tetrahymena, Colpidium, Glaucoma, 

 (Ophryidium), Metaradiophrya, (S ten tor), (Opalina). 



* Stalk fibrils of Opercularia, Carchesium, Zoothamnium. 

 Discharged trichocysts of many holotrich ciliates and of the 



flagellate Oxhyrris marina. 

 Conceivably, the accessory ribbons of the flagella of euglenoids. 



2. Cylindrical fibrils described as tubular, with dense peripheries and 

 low-density centers; ranging in measured diameter from 12 to 30 my.. 



a. Fibrils at least slightly sinuous, never in definite sheets or 

 lattices. 



* Spindle fibers. 



Fibrils in mucopolysaccharide capsule of Gromia. 



Fibrils in axopodia of Actinophrys. 



Fibrils in external cyst wall of Sarcocystis tenella. 



b. Fibrils straight or nearly so ; regularly spaced or arranged in 



conspicuously orderly arrays. 

 *A11 kinetosomes, cilia, and flagella. 

 *(Fibrils in pellicle of Tetramitus). 

 Minute cylinders in lamellae beneath shell of Gromia. 

 Fibrils in extremities of pellicular ribs of gregarines. 

 Longitudinal pellicular fibrils of sporozoites of Plasmodium, 



{Sarcocystis), (Toxoplasma). 

 (Fibrils in polar filament of Nose ma). 

 Fibrils in haptonemata of Chrysochromulina. 

 *Pellicular fibrils and kinetosomal connectives in Euglena, 



Peranema. 



