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Geo. K. Sutherland. 
The mycelium developed in the deeper portions of the thallus 
may be hyaline, but towards the outer layers it becomes brown, 
bending sharply upwards into the dark coloured, erect, simple or 
slightly branched, stiff, fertile hyphae already noted. These produce 
the conidia at their tips, and, when growing actively, elongate 
sympodially. The type of conidium is extremely varied (Fig. 1, 6.) 
These first formed are long and appear to act like sterigmata (Fig. 
1, 4) from the tips of which arise either other sterigma-like forms 
or chains of smaller conidia. The longer connecting forms usually 
become 1-3-septate and vary in length from 20-40/x, with an 
average diameter of from 4-5//,. They germinate like the smaller 
ones, but not so readily, doubtless owing to a certain exhaustion 
of their contents and energy. During short periods of growth the 
conidiophores may produce the smaller continuous or uniseptate 
conidia directly. These vary in size from 5-15//., x 5-6’5/x. The 
ones produced during moist conditions usually become darker 
coloured on exposure to drought, and all possess a thick resistant 
smooth wall. It is noticeable that a greater proportion of septate 
conidia are formed during dry conditions of growth. 
Fig. 1. Cladosporium algarum. 7, conidiophores ; 2, conidia from cultures ; 
3, germination of conidia in salt water; 4, attachment of conidia ; 5, conidio¬ 
phores showing renewed growth ; 6, types of conidia. 
Culture experiments were first initiated to separate Clado¬ 
sporium from the other fungi accompanying it. In these, this species 
behaves very much after the manner of Cladosporium herbarutn or 
Cl. epiphyllum, giving the same variety of fructifications. Fig. 1, 2, 
represents a common type with regular sterigma-like bodies and 
