WORKS REFERRED TO IN THE TEXT. 



(This is not a general bibliography of the subject, but only a list of 

 the works to which reference is made. Where there is general reference 

 to a large series of investigations by a particular author, as a rule only 

 one reference is given, to some important contribution; from which the 

 reader can follow up the subject if he desires. This is done particularly 

 when the subject lies to one side of our main field.) 



Ackert, J. E. f 1916. On the effect of selection in Paramecium. Ge- 

 netics, 1:387-405. Agar, W. E., 1914. Experiments on inheritance in 

 parthenogenesis. Phil. Trans. Roy. Soc., London, 205 B: 421-489. 



Baitsell, G. A., 1912. Experiments on the reproduction of the Hypo- 

 trichous Infusoria. I. Conjugation between closely related individuals 

 of Stylonychia pustulata. Jour. Exper. Zool., 13:47-77. Id., 1914. Ex- 

 periments on the reproduction of the Hypotrichous Infusoria. II. A 

 study of the so-called life cycle in Oxytricha fallax and Pleurotricha 

 lanceolata. Jour. Exper. Zool., 16:211-235. Balbiani, E. G., 1881-1882. 

 Les Protozoaires. Journ. de Microg., T. 5 et 6. (Cited from Biitschli, 

 1880.) Barber, M. A., 1907. On heredity in certain micro-organisms. 

 Kansas Univ. Sci. Bui., 4 (1); 1-47 Bateson, W., 1914. The Address 

 of the President of the British Association for the Advancement of 

 Science. Science, 40:287-302, 319-333. Blakeslee, A. P., 1904. Sexual 

 reproduction in the Mucorineae. Proc. Amer. Acad., 40:205-319. Id., 

 1913. Conjugation in the heterogamic genus Zygorhynchus. Mycolog. 

 Centralbl., 2: 241-244. Bott, K., 1907. Ueber die Fortpflanzung von 

 Pelomyxa palustris, nebst Mitteilungen tiber ihren Bau. Arch. f. Protis- 

 tenkunde, 8: 120-158. Bridges, C. B., 1916. Non-disjunction as proof of 

 the chromosome theory of heredity. Genetics, 1:1-52, 107-163. Brown- 

 Stquard, C. E., 1869. Nouvelles recherches sur 1'^pilepsie due a certaines 

 Idsions de la moelle 6piniere et des nerfs rachidiens. Arch. Physiol. 

 Norm. Path., 2:211-220, 422-437, 496-503. Butschli, O., 1875. Vor- 

 laufige Mittheilung einiger Resultate von Studien tiber die Conjuga- 

 tion der Infusorien und die Zelltheilung. Zeitschr. f. wiss. Zool., 

 25:426-441. Id., 1880-82. Protozoa. Bronn's Klassen und Ordnungen 

 des Thierreichs, Bd. 1. 2035 pp. 



Calkins, G. N., 1902. Studies on the life-history of Protozoa. I. The 

 life-cycle of Paramoecium caudatum. Arch. f. Entw.-Mech., 15:139- 

 186. Id., 1902a. Studies on the life-history of Protozoa. III. The six 

 hundred and twentieth generation of Paramoecium caudatum. Biol. Bui., 

 S: 192-205. Id., 1904. Studies on -the life-history of Protozoa. IV. Death 

 of the A series. Conclusions. Jour. Exp. Zool., 1 : 423-461. Id., 1906. 

 The Protozoan life cycle. Biol. Bui., 11:229-244. Id., 1911. Regenera- 

 tion and cell division in Uronychia. Jour. Exper. Zool., 10:95-116. Id., 

 1915. Cycles and rhythms and the problem of "immortality" in Para- 

 mecium. Amer. Nat., 49:65-76. Id., 1915a. Didinium nasutum. I. The 

 life history. Jour. Exper. Zool., 19: 225-241. Id., 1916. General biology 



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