SEX IN PROTOZOA 249 



Cash, J., and J. Hopkinson. 1905. The British Freshwater Rhizopoda and 



Heliozoa, Vol. 1. The Ray Society, London. 

 . 1909. The British Freshwater Rhizopoda and Heliozoa, Vol. 2. The 



Ray Society, London. 

 Cash, J., G. H. W'ailcs, and J. Hopkinson. 1915. The British Freshwater 



Rhizopoda and Heliozoa, Vol. 3. The Ray Society, London. 

 Chagas, C. 1927. Quelques aspects evolutifs du Trypanosoma cruzi dans 



rinscct transniitteur. Conipt. rend. soc. biol., 97, 829-832. 

 Chakravarty, ]\L 1935. Studies on Sporozoa from Indian millipedes. IV. Life- 

 history of a cephaline gregarine, Hyalosporina ca/nbalopsisae, n. gen., n. 



sp. Arch. Protistenk., 86, 211-218. 

 Chatton, E. 1920. Le peridiniens parasites. Morphologie, reproduction, etholo- 



gie. Arch. zool. exptl. et gen., 59, 1-475. 

 . 1927. La gametogenese meiotic du flagelle Faradiniuin poiicheti. 



Covipt. rend., 185, 553-555. 

 Chatton, E., and B. Biecheler. 1936. Documents nouveaux relatifs aux cocci- 



dinides (dinoflagelles parasites). La sexualite du Coccidinium mesnili n. 



sp. Covipt. rend., 203, 573-576. 

 Chejfec, M. 1930. Zur Kenntnis der Kernreorganisationsprozesse bei Farame- 



ciiini caudatum. Arch. Protistenk., 70, 87-118. 

 Chen, T, T. 1936. Observations on mitosis in opalinids (Protozoa, Ciliata). I. 



The behavior and individuality of chromosomes and their significance. 



Froc. Natl. Acad. Sci. U. S., 22, 594-602. 

 . 1940a. Polyploidy and its origin in Faraineciinn. J. Heredity, 31, 175- 



184. 

 . 1940b. Conjugation in Paramecium hursaria between animals with 



diverse nuclear constitution. /. Heredity, 31, 185-196. 

 . 1940c. Conjugation of three animals in Paramecium hursaria. Froc. 



Natl. Acad. Sci. U. S., 26, 231-238. 

 . 1940d. Conjugation in Paramecium hursaria between animals with very 



different chromosome numbers and between animals with and without 



nuclei. Froc. Natl. Acad. Sci. U. S., 26, 243-246. 

 . 1946a. Conjugation in Paramecium hursaria. I. Conjugation of three 



animals. /. MorphoL, 78, 353-395. 

 . 1946b. Conjugation in Faramecimn hursaria. II. Nuclear phenomena in 



lethal conjugation between varieties. /. MorphoL, 79, 125-262. 

 . 1948. Chromosomes in Opalinidae (Protozoa, Ciliata) with special ref- 

 erence to their behavior, morphology, individuahty, diploidy, haploidy, 



and association with nucleoli. /. MorphoL, 83, 281-357. 

 . 1951a. Conjugation in Paramedian hursaria. III. Nuclear changes in 



conjugation between double monsters and single animals. /. MorphoL, 



88, 245-291. 

 -. 1951b. Conjugation in Paramecium hursaria. IV. Nuclear behavior in 



conjugation between old and young clones. /. MorphoL, 88, 293-359. 

 Cienkowski, L. 1871a. Ueber Schwarmerbildung bei Noctiluca 7/iiliaris. Arch, 

 viikroskop. Anat., 7, 131-139. 



