394 
Horne and Williamson.—The Morphology and 
conidial fructifications. The two new species differ from E. acremonioides 
chiefly in the form of the conidiophores, which are irregularly branched and 
not typically swollen at the apex, and in the fact that the second type of 
spore is uncoloured, whereas it is brown in E. acremonioides. Since the two 
species agree more closely with Eidamia acremonioides than with any allied 
fungus, they have been named Eidamia viridesce?is,r\. sp., and Eidamia 
catenulata , n. sp., respectively. 
II. Morphological Characters. 
i. Eidamia acremonioides ; syn. Monosporinm acremonioides , Harz, 
Papnlaspora aspergilliformis , Eidam. 
A culture on rice was obtained from the fungus collection at Amster¬ 
dam. The growth on rice was filmy and coloured brown, due to the 
number of large brown spores produced. Single spore cultures were 
obtained from gelatine dilutions and used to subculture on a variety 
of media. 
On potato mush agar at 20° C. a filmy growth of mycelium was obtained 
producing macrospores (spores of the Monosporinm type). The colour of 
the culture gradually changed from 
snuff-brown (see Ridgeway’s ‘ Colour 
Standards’ for nomenclature adopted) 
to Vandyke brown as the spores 
matured. These spores are large, 
brown, and ovoid, resembling those 
described for Monosporinm by Dela¬ 
croix. They are borne singly on 
lateral branches of variable length, 
and these are themselves branched 
often at a right or obtuse angle. 
These spores are thick-walled and 
vary in size from 12 /xX io /x to 34 /x x 28 /x, or even reach 40 /x x 34 /x on potato 
glucose agar. Fig. 1 shows the typical branching and the macrospores of 
Eidamia acremonioides . Macrospores were the only spores produced when 
the fungus was grown on rice at 20° G, potato slab at 25 0 C, and potato 
mush agar at 30° C. 
The conidiophores are long, averaging 140 jx in length, terminating in 
a swollen head of about 24 jx in diameter on which are borne the sterigmata 
and conidia. The sterigmata are swollen towards the base and pointed at 
the apex, being 6 /x in length and 4 /x in basal width. On these the conidia 
arise typically in short chains, though often they appear to cling to the 
pointed ends of the sterigmata in groups (Fig. 2). The conidia are hyaline, 
circular, or egg-shaped, being 1-5 /x to 2 /x in diameter. 
Fig. 1. E. acreinonioides. Mycelium, showing 
typical branching and macrospores, x 390. 
