PLATE XIII. 



% 



FIGS. PAGE 



1-3. C lost erium costatum Corda. 1, x 220; 2, x 



200 (after Rails) ; 3, x 520 . .120 



4-6. Cl. regulars Breb. 4, x 200 (after Brebisson) ; 



5 and 6, x 520 . . .122 



7-16. CL striolatum Ehrenb. 7-12, outline figures to 

 show the variability of form and the sutures, 

 x 140; 13, x 400; 14 and 15, x 520; 16, 

 /ygospore, x 200 (after Ralfs) . . 122 



17. Cl. striolatum forma recta West. x 400 124 



