PLATE IV. 



FIGS. PAGE 



13. Mesotsenium macrococcum (Kiitz.) Roy & Biss. 

 var. micrococcum (Kiitz.) West & G. (3. West. 

 1, x 520 ; 2 and 3, after De Bary, x 390 . 52 

 4-14. M. chlamydosporum De Bary. After De Barv, 



x 390 . . 52 



15-17. M. caldariorum (Lagerh.) Hansg. x 520 . 53 

 I.S-19. M. mirificum Arch. x 520 . . 50 



-0-21. M. Endlicherianum Nag. 20, after Nageli, x 



300; 21, x 520 . . .56 



22. M. Endlicherianum var. graiulv Nordst. x 520 57 

 23-29. Cyliiulrocystiy Brcl>i*N<niti Meiiegh. 23,, 24, 

 27-29, after De Bary, x 450; 25 and 26, 

 x 520 . . . .58 



32. C. Brebissomi Menegh. Young cells escaping 



from zygospore, after De Bary, x 390 58 



33-38. C. cra-ssa De Bary. 33-35, after De Bary, 



x 390; 36-38, x 520 . . . 5!) 



39. C. roseola Turn. After Turner, x 500 . 62 



40-41. C. dqdos2>om Lund. 40, x 520 ; 41, after 



Lundell, x 400 . . .61 



42-43. C. diplospora var. major West. 42, x 400 ; 



43, x 520 61 



