See Caullery and Mesnil, "Rech. sur les Actinomyxidies," Arch. Bot. vi. 1905, p. 272 f.
Léger, Arch. Zool. Exp. sér. 3, x. and sér. 4, v. (1902-3); for a full discussion of the relations of association and conjugation in Gregarines, see Woodcock in Quart. Journ. Micr. Sci. l. 1906, p. 61 f.
A Lithobius is figured in Vol. V. p. 45.
The schizont forms of some species, before the invariable alternation of schizogony and sporogony had been made out clearly, were regarded as "monogenic" genera, under the names of Eimeria, A. Schn., and Pfeifferella, Labbé; while those in which the formation of spores containing sickles had been clearly seen were termed "digenic." Labbé's monograph, "Die Sporozoen," in the Tierreich, is unfortunately written from this point of view, which had already become doubtful, and is now demonstrated to be erroneous, chiefly by the labours of Schaudinn and Siedlecki.
A species has been described, however, in the blood of the Indian Gerbille (Gerbillus indicus), completing the sexual process in the Louse of its host. A figure of G. aegyptius will be found in Vol. X. (1902) p. 475.