Thom and Turesson : Penicillium avellaneum 287 
Cane Sugar, good growth up to 50 per cent. In 60 per cent, 
feeble, slowly reaching normal proportions. 
Galactose j per cent., vigorous growth of characteristic colonies. 
Lactose j per cent., as in galactose, Levulose j per cent, not 
vigorous. 
Glycerin j per cent., fairly good growth ; potato starch, fair 
growth. 
Butterfat, growth slow; lactic acid 0.9 per cent, poor growth. 
Fifteen per cent, gelatine in ivater, good growth, liquefaction 
beginning within 48 hours at 37° C. ; at 27° C. within 3 days, 
at room temperature after 5 of 6 days. 
Fig 3 . Microphotograph of perithecia by J. Westerberg. 
Milk, good growth; curdling beginning on the third day at 
37° C. ; on the fourth day at 27° C. ; on the sixth or seventh at 
room temperature. 
Pigment formation in cultures kept at 27° C. begun on the 
seventh day in butterfat and potato starch, slight in the other 
media. None in bean agar at the end of six weeks. At room 
temperature coloration begun on the tenth day, maximum in but- 
terfat; none in bean agar at the end of six weeks. 
Slow growth at room temperature ; fairly good at 27° C. ; 
optimum at 36-38° C. ; germination and growth feeble at 42° C. 
