EXPLANATION OF PLATE III. 



Ustilago Maydis, Lev. 

 Page 26. 

 Fig. 1. Part of the " tassel" of Indian corn affected by the corn smut. 

 Fig. 2. Part of a cob of corn affected by the corn smut. 

 Fig. 3. Five of the spores x 400. 



Helminthosporium inconspicuum, C. & E. 



Page 28. 

 Fig. 4. Part of a leaf of Indian corn with its terminal part discolored and spotted 



by the fungus. 

 Fig. 5. A small fragment bearing six plants moderately magnified. 

 Fig. 6. Three plants bearing spores x 400. 



Puccinia Maydis, Potsch. 

 Page 29. 

 Fig. 7. Pustules of the fungus on the leaf of Indian corn. 

 Fig. 8. Four pustules of the early state of the fungus. 



Fig. 9. Vertical sections through two pustules of the fungus, moderately magni- 

 fied ; the one at the left the early state. 

 Fig. 10. Four of the early spores x 400. 

 Fig. 11. Three spores x 400. 



Ramularia FragaPvIA, Pk. 

 Page 30. 

 Fig. 12. Part of a leaf spotted by the fungus. 

 Fig. 13. A tuft of the fungus bearing four spores x 400. 

 Fig. 14. Two separate stems of the fungus, one of them branched, x 400. 

 Fig. 15. Four spores x 400. 



MUCOR IN^EQUALIS, Pk. 



Page 31. 



Fig. 16. A tuft of the fungus. 



Fig. 17. A branched and an unbranched stem of the fungus with their spore-cases, 

 moderately magnified ; the one at the left ruptured irregularly and 

 discharging its spores, the one at the right collapsed and the other 

 yet unchanged. 



Fig. 18. Several spores x 400. 



