28 Setchell, — An Examination of the Species 
more in the structure of the sori than the type does from 
D. deformans , and at the same time it is not safe to separate 
into two species two forms which agree so closely in habit and 
host until further evidence can be obtained from the develop- 
ment and germination. 
Season. Specimens apparently mature were collected by 
Fletcher in June and others in August. This is earlier than 
I have been able to detect the form found about Norwich. 
Distribution. Ottawa, Canada, James Fletcher ! 
Literature. 
Doassamia Farlowii, Cornu, Ann. Sci. Nat., s 6 r. 6, T. 15, p. 287, 
PI. 16, f. 5-6. June, 1883. 
Cornu, Bull. Soc. Bot. France, Vol. XXX, p. 133. Aug. 
1883. 
Farlow, Bot. Gaz., Vol. VIII, p. 276. Aug. 1883. 
Farlow, Bot. Gaz., Vol. VIII, p. 318. Oct. 1883. 
occulta , Cornu, in Farlow, Trans. Ottawa Field Nat. Club, Vol. 
II, p. 127. 1884. 
Farlowii , Fisch, Ber. Deutsch Bot. Gesell., Bd. II, pp. 406 and 
415. Nov. 1884. 
Martianoffiana , Schroeter, Pilzfl. Schles., p. 287. 1887 (as to 
syn. D. Farlowii). 
occulta, De Toni, Journ. Myc., Vol. IV, p. 16. Mar. 1888 (in 
part). 
De Toni in Sacc., Syll. Fung., Vol. VII, p. 504. Oct. 
1888 (in part). 
Doassansia Martianoffiana ( Thuemi), Schroeter. 
The only accessible specimens were those from Sweden, 
collected by Johanson, and distributed in the exsiccati (see 
below). The fungus inhabits the floating leaves of various 
species of Potamogeton , on which it forms nearly circular spots 
of a very pale yellow. The sori do not show as prominently 
as in the species of Eudoassansia, and there is no dis- 
tortion of the leaf at all. But there appear in each of 
Johanson’s specimens little white tufts scattered about on the 
