230 Explanation of Plates. 



PLATE XXXIV. 



{All Figures x 500 unless otherwise stated.) 



USTILAGO AND CINTRACTIA. 

 Fig. 



63. Section through axis of inflorescence of Stipa affected by G. hypodytes . . X 25 



<34. Portion of a similar section . , . . . . . . . . x 150 



(J5, Spores of same. 



■06. Section through jjortion of axis of inflorescence of Cynodon dactylon affected by 

 Ustilago cynodontis .. . . . . . . ' . . . . x 100 



<J7. Spores of U. cynodontis. 



68. Section through ovary of Carex breviculmis affected by C. caricis . . X 150 



69. Surface view of spores from above, showing markings. 



70. Sectional view of spores. 



71. Spores of C. caricis from Sydow's Ustilagineen, No. 360. 



