DESCRIPTION'S OF THE PLATES. 
425 
DESCRIPTION OF PLATE XXITT. 
O 
Zodiomyces vorticeUarius Thaxter. 
1-4. Young individuals in various stages of development D 2, 
Fig. 5. Young individual, A cavity is forming above tlieperitbccigerous cells. D 2, 
Fig. 6. Young individual, the upper portion of the receptacle seen in optical Faction. The enci 
of the primary appendage at the left has been broken off. The secondary appcndajr* liave bu* * 
through the superficial cells at the apex of the receptacle, and the porithecia arc boj;iuning to arise 
from the perithecigerous cells at the base of the cup-like cavity. D 2. 
Fig, 7. More mature individual, the optical section of its cup-like extremity indicated in part. 
The primary appendage has disappeared; and one perithecium is nearly mature. A 12. 
Fig. 8. Mature individual. A 12, 
Fig. 9. Section of portion of extremity showing cup-like form, tlie secondary appendages on tho 
right arising from the inner surface of its rim distinct from the central fertile cells, fmiti whuh ar^'* 
antheridia and perithecia in various stages of development. Drawn and partly reconstructed from 
a microtome section. D 4. 
gs. 10-12. Anterior, lateral^ and posterior views of mature perithecia. T) 4. 
gs. 13-15. Very young perithecia, showing origin as terminal cell (fig. 13), and two further 
ons of this cell. J 4. 
g. 16. Young perithecium. J 4. 
g. 17. Young perithecium with trichogyne and conjugating antherozoid. Leitz oil ^V 
g. 18. A similar stasre. D 12. 
F 
F 
divis 
F 
F 
F 
F 
F 
F 
F 
F 
withered and broken oflF, J 4. 
or 
19, Young perithecium before development of its appendages, lateral view. D 4. 
g. 20. Young perithecium : its appendages beginning to bud out, posterior view. i> 4. 
gs. 21-23, Antheridial branches, bearing exogenous antherozoids. D 12. 
24. Spore. D 4. 
25. Young perithecium in which the ascogenic cell has divided, the trichogyne having 
cr 
cr 
Ktl- 
