PLATE IX. 



FIGS. 



PAGE 



1-8. Pt'iiiuiii spirostriolatum Barker. 1-4, x 520 

 5 and 6, two apices, x 1280; 7, portion of cell- 

 wall, x 1280 ; 8, zyg-ospore, after Ralfs . 88 

 9-11. P. poli/morphum Forty. 9, after Lundell x 



400; 10, x 400; 11, x 520 . . 90 



12. P. lagenarioides Roy. After Roy, x 400 93 



13-14. P. Cucurbitinum Biss. x 520 . 94 



15. P. Cucurbitinum forma. x 520 . 96 



16.- P. Cueurbitimim forma minor West. x 400 . 95 

 17. P. Cucurbitinum forma major West &G S West 



x 520 . ' . . ; 95 



18. P. Cucurbitinum var. Scottcum West & G. S 



West, x 400 ... 95 



19-20. P. Cucurbitinum var. subpolymorphum Nordst. 



19, x 400; 20, after Nordstedt, x 570 95 



