1915] Swczjj: Biiiarij and Multiple Fission in Hexamitiis 83 



up by successive splitting off of one individual at a time. The biou- 

 clear structure of the potential individuals is maiutained throughout 

 the process. 



The processes of both binary and multiple fission are similar 

 throughout in at least two species, Hexamitiis ovatiis and II. intestinalis. 

 Multiple fission has been observed in a third species, H. batracJionim. 



Transmitted September '29, 1915. 



Zoological Laboratory, 



University of California. 



LITERATURE CITED 



Alf.xeiepf, a. 



1910. Sur les flagelles intestinaux des poissons marins. Arch. Zool. Exp. et 



Gen., 46, i-xx, 12 figs, in text. 



1911. Notes sur les flagelles. Ibid., 46, 491-.52o, 15 figs, in text. 



1912. Sur quelques protistes parasites intestinaux d'une tortue de Ceylon 



(Nicoria trijuga). Zool. Anz., 40, 97-105, 3 figs, in text. 

 1914. Notes protistologiques. Ibid., 43, 515-524, 1 fig. in text. 



BUTSCHLI, O. 



1878. Beitrage zur Kenntnias der Flagellaten und verwandten Organism. 

 Zeitsch. f. wiss. Zool., 30, 205-281, i^ls. 11-15. 



DOBELL, C. C. 



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 DUJARDIN, F. 



1841. Histoire naturelle des zoophytes: Infusoires. (Paris. Libr. Encycl., 

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 FOA, A. 



1904. Eicerche intorno a due specie di flagellati parassiti. Atti K. Accad. 

 Lincei, (5), 13, 121-130, 6 figs, in text. 

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



1915a. Mitosis in Trichomonas. Proc. Nation. Acad. Sci., Washington, 1, 



315-321, 9 figs, in text. 

 1915b. Mitosis and multiple fission in trichomonad flagellates Proc. Amer. 

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

 Prowazek. S. 



1904. Untersuchungen iiber einige parasitische Flagellaten. Arb. Kais. 

 Gesund., 21, 1-39, pis. 1-A, 2 figs, in text. 

 ■\Venyon, C. M. 



1907. Observations on the Protozoa in the intestine of mice. Arch. Prot. 

 Suppl., 1, 169-197, pis. 10-12, 1 fig. in text. 



