1915] Swczij: On a New Trkhoinonad FlagcUatc 93 



the possibility of such a relation existing, but the entire lack of any 

 transitional stages would suggest that it is, for the present at any rate, 

 only a remote possibility. In view of these considerations and also 

 because there is no genus in which it can consistently be placed, it is 

 proposed it establish for it a new genus, Trichomitus. belonging near 

 Trichonwiins among the Tetramitidae. The generic characters consist 

 of the following : 



Trichomitus gen. nov. 



A motor apparatus consisting of three equal anterior flagella aris- 

 ing from a single blepharoplast, with a well-developed undulating 

 membrane extending posteriorly along the surface of the body and 

 terminating in a posterior trailing flagellum. The membrane is bor- 

 dered by a chromatic margin and has at its base tlie chromatic basal 

 rod or parabasal body. The nucleus is placed anteriorly, immediately 

 behind the blepharoplast. There is neither cytostome nor axostyle 

 present. The type species of this genus is Trichomitus parvus. The 

 type slide is in the protozoological collections of the Department of 

 Zoology of the University of California, and a cotype slide has been 

 sent to the United States National Museum. 



Grateful acknowledgments are due to Professor C. A. Kofoid for 

 the help and encouragement given throughout these investigations. 



Transmitted September 30, 1915. 



Zoological LABORATOBy, 

 University of California. 



LITERATURE CITED 



KoFOiD, C. A., and Swezy, O. 



1915(1. Mitosis in Trichomonas. Proc. Nat. Aead. Sci., Washington, 1, 315- 



321, 9 figs, in text. 

 19156. Mitosis and multiple fission in trichomonad flagellates. Proc. Amer. 

 Acad. Arts and Sci., Boston, 51, 287-388, 8 pis., 7 figs, in text. 



