M. C. COOKE ON SOME REMARKABLE MOULDS. 139 



more and sometimes less, of these club-shaped stems, which showed 

 no septa, but were covered at their apices with slender short spi- 

 cules, each of which was surmounted by a solitary globose, dark- 

 brown spore, some 4 micromill. in diameter, with a minutely 

 roughened external coat, or epispore. 



The structure and habit of this mould differs wholly from any 

 of the genera noted by Saccardo in his " Conspectus." From Zy~ 

 godesmns in the clavate hypha?, and the capitate manner in which 

 the spores are produced, and, indeed, from all other genera in the 

 capitate spores, except only Stachybotrys, Periconia, FucJcelina, 

 Camptoum, and Acrotheca. Of these five genera only three have 

 globose spores, namely, the first three just mentioned. Stachybo- 

 trys has branched slender hypba?. In Periconia the hypha? are 

 slender, and solitary. FucJcelina is to me a genus unknown, be- 

 yond the description, but does not appear to be the same. There 

 was therefore no other alternative but to give it a new station and 

 name. 



Sterigmatocystis Ferruginea, Cooke, u Grevillea" viii., 95. 



About the year 1878 I received from my friend, Mr. F. Moore, 

 the pupa of an Erie silk moth, from Cachar, which, had covering 

 the greater part of its exterior, a bright rust-coloured mould, to 

 which I have applied the above name. The woolly effused patches 

 of the mould had just such an appearance as the common Asper- 

 gillus glaucus might be expected to have if it were dyed of a bright 

 rust-colour. The long, slender, septate threads, or stems, were 

 about one-hundredth of a millemetre in thickness, terminated by a 

 globose head of rusty-brown spores, the stem itself being trans- 

 parent and almost colourless. The base of the threads was effused 

 in a matted intricate mycelium, penetrating through the joints into 

 the pupa. The most interesting part of the structure, however, was 

 the capitulum, or head of spores. By a little careful manipulation 

 it soon became evident that the supporting hypha was expanded at 

 its apex into a globose knob, nearly three times the diameter of the 

 thread. This was surrounded on all sides by a compact stratum of 

 wedge-shaped bodies, four times as long as broad, and each of these 

 bearing on its summit three or four elliptical cells, which cells were 

 individually crowned by three or four short papilla?. To each one 

 of these papilla? belonged a globose, rough spore, nearly one-hun- 

 dredth of a millemetre in diameter, or about the thickness of the 



