PLATE XXXIX. 



PAGE 



1-4. Euastrum denticulatum (Kirchn.) Gay. 1-3, 



x 520 ; 4, x 430 . . .56 



5. E. denticulatum var. granulatum West, x 400 57 

 6-7. E. incavatum Josh. & Nordst. 6,, x 400 ; 7 ', 



x 570 (after Nordstedt) . . 58 



8-9. E. montanum West & G. S. West, x 520 . 58 

 10-12. E. pectinatum Breb. 10, x 430; 11 and 12, 



zygospores; 11, x 400; 12, x 520 . 60 



13-15. E. pectinatum var. inevolutum West & G. S. 



West. 13 and 14, x 430; 15, x 520 . 61 



16. E. pectinatum var. brachylobum Wittr. x 400 



(after Wittrock) . . .62 



17. E.craftsangulatumHorg. x 555 (after B or ge sen) 70 

 18. E. crassangulatum var. ornatum West. x 400 70 

 19. E. gemmatum Breb. a and c, x 430 : b } vertical 



view of another specimen, x 520 . . 63 



.^/. occidentale West & G. S. West, x 430 67 



