CHROMOGENIC FUNGI WHICH DISCOLOR WOOD. 73 
author for investigation. A species of Ceratostomella was 
found among the cells of the wood and fruiting quite 
abundantly on the surface. The characters of the fungus 
agree in part with C’. pilifera, to which it is closely related. 
‘It has ascospores which are constantly of a slightly differ- 
ent shape, and is often characterized by more than one 
whorl of bristles on the beaked ostiolum. The conidia are 
considerably smaller, and the hyphae on which they are 
borne are more frequently branched, thus giving rise to 
larger clusters. Owing to the frequent presence of more 
than one ring of bristles on the ostiolum, the name C. 
pluriannulata is here given to the species, with the fol- 
lowing cultural characters : — 
MYCELIUM. 
The growth of the mycelium from either conidia or 
ascospores resembles that of C. pilifera. The spores 
germinate in pine-decoction agar in 2 to 3 hours, and in 2 to 
3 days a white, floccose mycelium bearing conidia appears. 
In from 5 to 10 days perithecia appear, the development 
of which is like that of C’. pilifera. 
ConrIDIA. 
The hyaline unicellular conidia are borne on branching - 
septate, hyaline, upright hyphae in simple or compound 
whorls (pl. 5, f.1). In the older portions of the colony, 
the conidia fall off and adhere in masses forming clusters 
resembling Cephalosporium. These clusters vary in size 
from 10u to 100m in diameter. The larger clusters are 
formed by the adherence of several spore clusters into one 
mass. The conidia measure 54 to 8u in length and 2p to 
3u in width, averaging 6p by 1.5p. 
PERITHECIA. 
The perithecia are borne superficially on the wood, or on 
the mycelium, there being no definite stroma in this or in 
