DESCRIPTIONS OF THE PLATES. 



423 



DESCRIPTION OF PLATE XXI. 



Laboulbenia variabilis Thaxter. 

 Fig. 1. Mature individual. A 12. 



Fig. 2. Young individual, trichogyne with antherozoids in situ. D 2. 

 Fig. 3. Fertile branch with groups of antheridia. D 12. 

 Fig. 4. Spore. D 4. 



Fig. 12. Tip of peritheciurn, the base of old trichogyne at the left. D 4. 



Laboulbenia brachiata Thaxter. 



Fig. 5. Mature individual. A 12. 



Fig. 6. Part of fertile branch with antheridia. D 12. 



Fig. 7. Spore. D 4. 



Laboulbenia minima Thaxter. 



Figs. 8, 9. Mature individuals. A 12. 

 Fig. 10. Young individual. D 4. 

 Fig. 11. Spore. D 4. 

 (Fig. 12. See sub L. variabilis.) 



Ijaboulbenia Scliizogenii Thaxter. 



Fig. 13. Mature individual. A 12. 



Fig. 14. Mature individual, small form. A 12. 



Fig. 15. Young individual, anterior view, showing highly developed trichogyne with spirally 

 coiled extremities. 



Laboulbenia Clivinoe Thaxter. 



Fig. 16. Mature individual, the branches of the appendage broken off. A 12. 

 Fig. 17. Tip of young individual, showing unbroken appendage. A 12. 

 Fig. 18. Spore. D 4. 



Laboulbenia Morionis Thaxter. 



Figs. 19, 20. Two mature individuals. A 12. 

 Fig. 21. Spore. D 4. 



Fig. 22. Terminal portion of young individual, showing unbroken appendages. D 4. 



