SPOROBOLOMYCES 



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Fig. 97. — Sporobolomyces roseus. The nucleus during spore- production by a spore. 

 Cultures made on malt-agar. Cells fixed with formalin-acetic-alcohol and 

 stained with iron-alum haematoxylin. a, a spore, with its basal end to the 

 left, containing a single nucleus ; b, c, and d, three spores each of which has 

 produced a conical sterigma on the end of which a new spore has developed, 

 as yet the new spore is without a nucleus ; e and /, the nucleus is dividing in 

 the neck between the sterigma and the new spore ; g, h, i, j, and k, the nucleus 

 has divided so that there is now one nucleus in the old spore and another in the 

 new spore ; I, the old spore is highly vacuolated and its nucleus appears to be 

 degenerate. Drawn by A. H. R. Buller and Ruth Macrae. Magnification, 2234. 



vol. v. O 



