Reproduction of Cystopus Candidus, Ldv. 337 
history of Cystopus candidus might then be represented by the 
following diagram. 
Gametophyte — The vegetative hyphae bearing gonidangia 
| and sexual organs. 
Oogonium. 
1 
Oosphere, with ovum nucleus. 
Antheridium. 
1 
Fertilizing tube, with male nucleus. 
Oospore — Uninucleate. 
I 
Sporophyte— Resting oospore — multinucleate. 
1 
Sporangium — Each nucleus of sporophyte divides to 
form the nuclei of four spores. 
v 
Zoospores. 
1 
Gametophyte. 
List of Papers Quoted. 
1807. Provost : Memoire sur la Cause immediate de la Carie ou Charbon des 
Bles & c., pp. 33-35. Montauban. (Abstracted in Ann. des Sci. Nat. 
Bot., Tome ii, 4th series, p. 155, by Tulasne.) 
1847. Tulasne, L. R. and Ch. : Sur les Ustilaginees comparees aux Uredinees. 
Ann. des Sci. Nat. Bot. 3rd series, Vol. vii, p. 43. 
1847. Leveille : Sur la Disposition methodique des Uredinees. Ann. des Sci. 
Nat. Bot. 3rd series, Vol. viii, p. 369. 
1848. Berkeley : On the White Rust of Cabbages. Journal of the Hort. Soc. 
Lond., Vol. iii, p. 265. 
1854. Tulasne, L. R. : Second Memoire sur les Uredinees et les Ustilaginees. 
Ann. des Sci. Nat. Bot., Tome ii, 4th series, p. 108. 
1859. Hoffmann: Bot. Zeitung, p. 210. 
1860. De Bary : Sur la Formation de Zoospores chez quelques Champignons, 
premier memoire. Ann. des Sci. Nat. Bot., Tome xiii, 4th series, 
p. 236. 
1863. De Bary : Recherches sur le Developpement de quelques Champignons 
parasites. Ann. des Sci. Nat. Bot., Tome xx, 4U1 series, p. 14. 
