474 Stevens . — Spore Formation in Botrychhcm virginianum . 
PLATE XXX. 
Fig. 44. Group of mother-cells after the completion of the second division, showing the grand- 
daughter-cells or young spores still connected with each other and closely invested by the membrane 
of the mother-cell, x 1800. 
Fig. 45. Granddaughter-cells separating from each other, but still adhering to the membrane 
of the mother-cell, x 1800. 
Fig. 46. Granddaughter-cells lying free within the membrane of the mother-cell, x 1800. 
Fig. 47. Portion of tapetal plasmodium that has flowed in between the groups of spore-mother- 
cells, as it appears at the close of the last division, x 900. 
Fig. 48. Mature spore embedded in the plasmodium which is now much depleted. One nucleus 
of the plasmodium also shown, x 900. 
Fig. 49. Nucleus of the plasmodium on a larger scale embedded in the depleted cytoplasm of 
the plasmodium. x 1800. 
