572 Dale . — Observations on Gymnoascaceae. 
of Gymnoascus , viz. G. Reessii , 6% ruber, G. aurantiacus (Peck), 
Sacc. ( Gymnascella aurantiaca , Peck), uncinatus (Eidam), 
(S', reticulatus (Zuk.), and G\ setosus (Eidam). 
In three later volumes he adds seven other species, viz. 
G. Zuffianus and G. EidamR ; G. Bourquelotii , ( 7 . tanbrinus , 
luteus , and G\ myriosporus 2 ; and ossicola 3 . 
During the present year (1902) a new species of Gymno- 
ascus has been described, but not figured, by Klocker 4 , under 
the name of G.Jlavus. Schroeter 5 , in treating of the Gymno- 
ascaceae in general, founded two new genera, Arachniotus 
and Amauroascus , by breaking up the original genus Gymno- 
ascus into three. He did not describe any new forms, but only 
reclassified those already known. Eidam’s Gymnoascus can- 
didus belongs to the genus Arachniotus , according to Schroe- 
ter’s classification, which has been generally adopted. It is 
the one which has been accepted by Matruchot and Dasson- 
ville, whose results, as will be seen later (page 590), appear to 
be confirmed by the work about to be described. 
Historical. 
The three species may first be considered briefly from the 
historical point of view. 
1. Gymnoascus Reessii (Baran.) was first described in 1872 
by Baranetzky 6 , who founded the genus on this species. He 
made cultures of the fungus, and worked out its life history 
in as great detail as was possible with the histological methods 
then available. His conclusions were afterwards disputed by 
subsequent workers, who, however, do not seem to have gone 
into the matter as thoroughly as Baranetzky. 
According to Baranetzky the fructifications are formed in the 
following manner : two swellings arise side by side on a single 
1 vol. X, p. 71 (1892). 2 vol. xi, p. 437 (1895). 
3 vol. xiv, p. 824 (1899). 
4 Bot. Cent., Bd. lxxxix, No. 22, p. 626 (1902), and Hedwigia, Bd. xli, Heft 2, 
pp. 80-8 (1902). 
5 Cohn’s Kryptogamen-Flora von Schlesien, Bd. iii, zweite Lieferung, zvveite 
Halfte, p. 210 (1893). See also Saccardo, 1. c., vol. xi, p. 438 (1895). 
6 Entwickelungsgeschichte des Gymnoascus Reessii , Bot. Zeit., p. 145 (1872). 
