526 
Wisconsin Academy of Sciences, Arts, and Letters . 
EXPLANATION OP PLATE XXIX. 
The figures were drav/n with the help of the camera lucida,, using 
the one-ha 1 f inch eyepiece and the one-twelfth oil objective. The 
tube length was 150 mm. 
Pig. 1. A series of gametes just after throwing off the sterile cells. 
Pig. 2. The fusion of two gametes. 
Pig, 3. A stage showing the first spore-mother-cell fully formed. 
Pig. 4. Simultaneous nuclear division preceding the division of the 
spore-mother-cell. 
Fig. 5. A later stage in which the spore-mother-cell has divided to 
form the spore and the stalk ce£l. 
Pig. 6. The second bud forming with the nuclei of the basal cell 
near its base. 
Fig. 7. Nuclear division preceding the formation of the second spore- 
mother-cell. The spindles are not parallel and the nucleoles 
are left behind within the fusion-cell. 
Pig. 8. A stage showing two nuclei in the bud and two in the fusion- 
cell. In figs. 7 and 8 the first spore is omitted. The stalk 
cell is present. 
Fig. 9. Two fully formed spores on a single basal cell. 
