MELLO: STUDY OF INDIAN ASPERGILLI. 159 



belonging to a same species. The colour of the fungus changes, but 

 variations are always uniform according to the age of the culture. 



General Colour of the Culture. The colour of this fungus is white 

 plalrc during the first 24 hours ; on the second day a slight greyish 

 tone is noticed, on the fourth the culture assumes a light marine 

 blue, on the sixth it becomes greyish blue, on the 8th the greyish 

 tone is predominant and the culture presents a beautiful gris souris 

 colour. From the first to the second week the colour changes into a 

 deep brownish, passing through a slightly violet tone. Later on the 

 culture is of a deep chocolate colour, which two months later 

 becomes very clear. 



Morphology and Mycological appearance — The morphology of the 

 fungus is the same as noted in the general description of the fungi 

 belonging to these genera. The following elements call forth our 

 attention : — 



Coaidiophores — length maxim. 650 micr., minim, 112 ; average 

 taken on 35 conidiophores 275 micr. ; breadth 3 to 6 micr. ; wall thick- 

 ness 0, 5 to 1 micr. 



Columellae almost always ovoid and claviform, very seldom 

 spherical. When old, they show a brownish pigmentation, more con- 

 centrated in the superior pole. Diameter of the spherical type 8 to 15 

 micr. Ovoid : length maxim. 25 minim. 10, average taken on 4-1 

 columellae, 13 micr. ; breadth maxim. 20, minim. 4, average taken on 

 the same number 10, 5 micr. 



Sterigmata very densely inserted, generally on the anterior : t of 

 the columella, rarely radiated. In old cultures a deep brownish 

 pigmentation is noticed. Primary Steriymata ovoid or claviform, 

 5 to 10 micr. long, 3 to 4 micr. broad. Secondary Sterigmata ovoid 

 or lanceolated 5 to 8 micr., long, 3 to 4 micr. broad. 



Conidia round, finely punctuated, bluish green at first, Ii«ht 

 brown at a latter stage, finally chocolate colour ; 2, 5 to 5 micr. 



Heads (Columella + Sterigmata + Conidia) round and elliptical. 

 Diameter of the round forms ; maxim. 55, minim. 36, average 42 

 micr. Dimensions of the elliptical forms : length maxim. 80, minim 10 

 average taken on 20 heads 45 micr. 



Perithecium yellow with a greenish tone, found only in old 

 cultures aged at least two months ; 30 to 35 micr. of diameter. 



Cultural characters. Plain agar. Good development, the cultures 

 having the following coloration : 48 hours, white platre ; 3 days 

 greyish ; 5 days, slight bluish tone ; 9 days, <jns souris ; 2 weeks! 

 chocolate brown ; 3 weeks, deep chocolate ; 2 months, clear chocolate ■ 

 3 months, idem. 



Glucosed sabouraud — Idem, very good development, the colour^ 

 being more vivid. 



