ALTERNATE PHASES IN FOLLICULINA. 87 



nor probably, upon direct concomitants of day and night suc- 

 cessions. 



The nature of the internal factors responsible for this apparent 

 striving to complete the normal alternations of phase, and the 

 causes underlying the omission of the usual making of a dwelling, 

 which would in this case be redundant, remain to be found out. 

 Were there a complex nervous system we might refer much of 

 these activities to it. 



REFERENCES TO LITERATURE. 

 Andrews, E. A. 



'14 The Bottle Animalcule, Folliculina; Ecological Notes. BIOL. BULL., 



Vol. XXVII., April, 1914, p. p262-285. 

 '15 Distribution of Folliculina in 1914. BIOL. BULL., XXIX., December, 



1915- PP- 372-380. 

 Daday, E. v. 

 '86 Ein kleiner beitrag zur kenntniss der Infussorienfauna des Golfs von 



Neapel. Mitth. d. Zool. Station, Neapel, Bd. 6, 1886. 

 Sahrlage, H. 



'16 Ueber die organization und den theilungs vorgang des Flaschentiererchens 

 (Folliculina ampulla). Arch. f. Protistenkunde, Bd. 37, 1917, pp. 139-171, 



2 PI. 



Penard, E. 



'19 On Folliculina boltoni (S. Kent). J. Royal Mic. Soc., December, 1919, 



PP- 305-319; 2 PL 

 Claparede and Lachman. 



'58 Etudes sur les Infusiores et Rhizopodes. Geneva, 1858. 

 Wright, Strethill. 



'59 Description of New Protozoa. Edinburg New Philosophical Journal, X., 



N.S., 1859, pp. 97-100, PL VII. 

 Lund. 



'17 Reversibility of Morphogenetic Processes in Bursaria. Journ. Ex. Zool., 



Vol. 24, Oct., 1917, p. 1-18, PL 1-6. 

 Mobius, K. 



'87 Das Flaschenthierchen, Folliculina ampulla. Abd. Nat. Ver. Hamburg., 

 10, 1887. 



