26 SetchelL — An Examination of the Species 
at one end (Fig. 47), or-more often at both ends (Figs. 48 and 49). 
Chains of secondary sporidia, at length more or less branched, 
are formed and grow upward to the surface of the water and 
project above it. They fail in pieces finally, but not until 
after some time. 
The spores germinated freely from the end of May until 
the middle of July. Sowings made from fresh material pro- 
duced no result, nor did sowings from dried material made in 
October, November, and March. The period, then, for the 
germination of this species seems to be in the spring and 
early summer. 
D. occulta differs in almost every respect from the species 
thus far enumerated, and seems to be best regarded as the 
type of a new section of the genus entirely different from 
those represented by D. alismatis and D. obscura . In all 
outward appearances the sori resemble those of D. alismatis ; 
but the thin sections, as described above, show an entirely 
different structure. This same type of sorus is found in the 
two following species, and warrants placing these three species 
in a subgenus of their own, for which the name Doassansiopsis 
seems appropriate. It may be that this type of sorus is 
worthy of generic rank, but it seems best for the present to 
consider it as belonging to a subgenus. 
The distinctions between D. occulta and the two following 
species will be discussed in connection with them. 
Season. Occurs from August until October. 
Distribution. The present species has been found in several 
localities near Norwich, Conn., Setchelll and in Germany, 
Irmisch . 
Literature. 
? Sc lerotium occultum , Hoffmann, Ic. Anal. Fung., pp. 67 to 68, Taf. 
16, f. 1 to 9. 1863. 
Doassamia 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). 
