1916] Sivezij: Kinctonitcleus of Flagellates 235 



7. This structure is not the kinetic center of the cell, but is an 

 accessory part of the motor apparatus, a kinetic reservoir, hence the 

 term "kinetonucleus" denotes a wrong interpretation of its function, 

 as does also the name blepharoplast, which is reserved for the definitive 

 basal granule of the flagella plus the centrosome in some cases at least. 

 As a more appropriate substitute for these names, and one which better 

 indicates its probable relations in the cell, is suggested the term ' ' para- 

 basal body," first proposed by Janicki for these organelles in the 

 Trichonymphida, Its application is here considerably extended. 



8. The binuclear theory of Hartraann and the foundation of the 

 order Binueleata, rest upon three main propositions, namely, that the 

 "kinetonucleus"' is composed of nuclear chromatin, that it originates 

 by division of the trophonucleus, and that it divides by mitosis. These 

 facts are contradicted by the results of careful investigations on both 

 the Haemoflagellata and Haemosporidia, where these conditions are 

 claimed to occur, which show, (1) by actual experimental proof, that 

 the "kinetonucleus" is not composed of nuclear chromatin, (2) that 

 in no single instance has it been found to arise by division of the 

 nucleus, and ( 3 ") that in no instance has a process of mitosis been found 

 which could be correlated with division of the other organelles and 

 with the cell. 



9. The Haemosporidia are affiliated with the Haemoflagellata 

 neither morphologically nor by a comparison of the developmental 

 data of the two groups. On the contrary, they are more nearly allied 

 to the Coccidia and should be retained therewith in the Sporozoa. 



10. The order Binueleata, being founded on false premises and 

 composed of families totally unrelated either morphologically or 

 phylogenetically, should not be retained as a valid order of the Masti- 

 gophora. 



Transmitted April 9, 1915. 



Zoological Laboratory, 



University of California, 

 Berkeley, California. 



