Agarella gracihs. 219 
As regards the monosporous type, according to Auerbach [3], the 
sporoblast arises as the result of fusion of a macro- and a micro- gamete. 
A priori, therefore, it would be simpler to regard the disporous type as 
arising from the association of two such sporoblasts, as suggested in this 
paper, than to believe with Auerbach that the disporous type has arisen 
from the monosporous “durch weitere Teilung der Pansporoblastenkerne,” 
bearing in mind the complex character of the spores. 
. Keyssevirz,G. Arch. f. Protistenk., 71, 1908. 
Lo Gurpice, P. Riv. mens. Pesca Idrobiologia, 6, 1911. 
10. Mercter, L. Mem. Acad. Sc. Belgique, 2, 1909. 
11. ScHroper, O. Arch. f. Protistenk., 9, 1907. 
Dees - oid. 19) L910! 
13. TH&étouan, P. Bull. sc. France Belgique, 26, 1895. 
REFERENCES. 
1. Acar, W. E. Quart. Journ. Microsc. Sci., 57, 1911. 
2. AurRBACH, M. Zool. Anz., 40, 1912. 
3. 5 Zool. Jahrb. Abt. f. Syst., 34, 1912. 
4, AWERINZEW, 8S. Arch. f. Protistenk., 74, 1908. 
5. DoFr.ein, F. Lehrb. d. Protozoenkunde, Jena, 1911. 
6. GEORGEVITCH. Arch. Zool. exper., 54, 1914. 
7. Josneu, H. Arch, f. Protistenk., 8, 1907. 
8 
9. 
(Issued separately, 15th September 1915.) 
