Faull. — Development of Ascus. 
Fig. 49. 
Fig. 50. 
Fig. 51. 
Fig. 52. 
Fig. 53. 
Fig. 54. 
Fig. 55. 
Fig. 56. 
Fig. 57. 
Fig. 58. 
Fig. 59. 
Fig. 60. 
Fig. 61. 
Fig. 62. 
Fig. 63. 
PLATE 10. 
Fig. 49-52, Neotiella albocincta. 
Fig. 53-59, Sordaria fimicola. 
One of the spindles of last mitosis. 
Two spores in which the double plasma membranes are completed 
and shown slightly separated. The upper spore with two nuclei is 
a rare occurrence. 
Retraction of nuclear beak. 
Nucleus of a growing spore in resting condition. 
Four-nucleated stage of ascus at end of second mitosis. A centro- 
some outside of each nucleus. 
Last mitosis. Dense protoplasm quite vacuolated. 
Late anaphase stage of last mitosis. Spore plasm being differen¬ 
tiated and limiting layer forming. 
Limiting layer completed about each spore and nuclear wall formed. 
Plasma membrane is organized. Corresponding plasma membrane 
that covers cavity in epiplasm not represented in drawing. 
Karyokinesis in the spore. 
Binucleated spore. 
Podospora zygospora. Extranuclear bodies about the “fusion” 
nucleus. 
Podospora curvula. Extranuclear bodies as in figure 60. 
P. curvula. Nucleus has moved down to entrance of tail preparatory 
to forming a septum. 
P. curvula. Septum has been formed and nucleus has retired. 
