DESCRIPTIONS OF THE PLATES. 



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DESCRIPTION OF PLATE XV. 



Laboulbenia contorta Thaxter. 

 Figs. 1, 2. Two mature individuals. A 12. 



Fig. 3. Tip of perithecium, the base of the trichogyne still adherent at the left. D 4. 

 Fig. 4. Portion of inner appendage with a pair of antheridia. D 12. 

 Fig. 5. Spore. D 4. 



Laboulbenia gibberosa Thaxter. 

 Fig. 6. Mature individual. A 12. 



Fig. 7. Portion of inner appendage with pair of antheridia. D 12. 

 Fig. 8. Spore. D 4. 



Laboulbenia umbonata Thaxter. 

 Fig. 9. Mature individual. A 12. 



Fig. 10. Young individual, showing antheridia and trichogyne with antherozoids in situ. A 12. 

 Fig. 11. Tip of perithecium, showing ear-like lips. D 4. 

 Fig. 12. Inner appendage with two antheridia. D 12. 



Laboulbenia terminalis Thaxter. 

 Fig. 13. Mature individual. A 12. 



Fig. 14. Branch of inner appendage with four antheridia. D 12. 

 Fig. 15. Spore. D 4. 



Laboulbenia rigida Thaxter. 

 Figs. 16, 17. Mature individuals. A 12. 



Laboulbenia polypliaga Thaxter. 



Figs. 18, 19. Two mature individuals. A 12. 



Fig. 20. Branch of inner appendage with six antheridia. D 12. 



Fig. 21. Spore. D 4. 



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