196 FUNGI. 
Spheria aquila, Fr.,* which is almost always found nestling in a 
woolly brown subiculum, for the most part composed of barren 
brown jointed threads. These threads, however, produce, under 
favourable conditions, mostly before the perfection of the peri- 
thecia, minute subglobose conidia, and in this state constitute 
what formerly bore the name of Sporolrichum fuscum, Link., but 
now recognized as the conidia of Spheria aquila, 
In Spheria nidulans, Schw., a North American specics, we have 
more than once found the davk brown subiculum bearing large 
triseptate conidia, having all the characters of the genus Helin 
thosporium. In Spheria pilosa, P., Messrs. Berkeley and Broome 
have observed oblong conidia, eather irregular in outline, ter- 
minating the hairs of the perithecium.+ The same authors 
have also figured the curious pentagonal conidia springing from 
flexuous threads accompanying Spheria felina, Fckl.,t and also 
the threads resembling those of a Cladotrichum with the angular 
conidia of Spheria cupulifera, B. and Br.§ A most remarkable 
example is also given by the Brothers Tulasne in Pleospora 
polytricha, in which the conidia-bearing threads not only 
surround, but grow upon the perithecia, and are crowned by 
fascicles of septate conidia. || 
Instances of this kind have now become so numerous that 
only a few can be cited as examples of the rest. It is not at all 
improbable that the majority of what are now classed together 
as species under the genus of black moulds, Helminthcesporium, 
will at some not very distant period be traced as the conidia of 
different species of ascomycetous fungi. The same fate may 
also await other allied genera, but until this association is 
established, they must keep the rank and position which has 
been assigned to them. 
Another form of dualism, differing somewhat in character 
* Cooke, ‘‘ Handtook,” ii. p. 853, No. 2549 ; specimens in Cooke's ‘‘ Fungi 
Britannici Exsiccati,” No. 270. 
+ Berk. and Br. ‘“‘ Ann. Nat. Hist.” (1865), No. 1096. 
t ‘‘ Ann. Nat. Hist.” (1871), No. 1332, pl. xx. fig. 23, 
§ Ibid. No. 1833, pl. xxi. fig. 24. 
|| Tulasne, “‘ Selecta Fungorum Carpologia,” ii. p. 269, pl. 29, 
