Faull. — Development of Ascus. 
» 
Fig. 40. 
Fig. 41. 
Fig. 42. 
Fig. 43. 
Fig. 44. 
Fig. 45. 
Fig. 46. 
Fig. 47. 
Fig. 48. 
PLATE 9. 
Figs. 40-48, Neotiellci albocincta. 
Mature one-nucleated stage of ascus. 
First spindle after cleavage of chromosomes. U-shaped chromosomes 
with very thick arms. Very fine astral rays. 
Somewhat older stage than represented in figure 41. Occasionally 
the long axis of the spindle is in a transverse plane, as it almost 
invariably is in Urnula craterium. 
Anaphase of first spindle stage. The arms of the chromosomes 
greatly lengthened. 
Equatorial-plate stage of second mitosis. Nuclear wall unusually 
persistent. 
Late anaphase stage at end of third mitosis. Limiting layer probably 
beginning to form. 
Nuclear walls re-formed and already growing towards center of 
ascus. The limiting layer is complete. 
Spore initials have grown somewhat and nuclear beaks have nearly 
reached their maximum length. 
Plasma membranes almost half completed. 
