400 Horne and Williamson .— The Morphology and 
coloured conidia produced on the aerial mycelium. This colour is insoluble 
in ether, chloroform, alcohol, and water. When the spores are suspended 
in ether the liquid remains uncoloured ; the spores sink slowly, indicating 
a lower specific gravity than in the case of E. viridescens. When suspended 
(7 
Fig. 9. E. catenulata. Condiophores. x 390. 
Fig. 10. E. catenulata. Conidiophores of 
various types on a synthetic medium plus agar at 20° C. 
x 290. 
Fig. 11. E. catenulata. The 
Penicillium type of conidiophore on 
potato glucose agar at 25 0 C. x 390. 
in chloroform the spores slowly rise to the surface, leaving the liquid 
uncoloured below. 
The spore colour varies according to the medium (this factor had not 
so pronounced an effect as with E. viridescens ), temperature, and the age 
of the growth. During fourteen days at 20° C. (potato extract agar) the 
