MITOCHONDRIA ASSOCIATED WITH THE KINETONUCLEUS OF TRYPANOSOMA MEGA

Received for publication, May 17, 1960. (5), it appears necessary to reserve this te rm for the Golgi appara tus of some flagellates and to name the DNA-conta in ing particle kinetoplast or kinetonucleus in accordance wi th most authors. The role tha t this particle plays in the physiology of the t rypanosome is unclear. Viable strains wi thout kinetonuclei are known, bu t only in the most specialized and mammal i an hos t -dependent species and they have never been ma in ta ined in in vitro cultures. This might be seen as evidence for an im-