PLATE LXXVIII. 



FIGS. PAGE 



1-10. Gosmarium ornatum Ralfs. 1-9, x 500 ; 10, 

 x about 300 (after Ralfs). 



Figs. 5-8 represent different dispositions 

 of the central granules in four individuals. 

 The three individuals represented in figs. 

 1-3 have each different arrangements of 

 these granules. Fig. 4, vertical view. Figs. 

 9 and 10, zygospores . . . 151 



11-14. C. commissurale^Yob. 11, x 400 (after Ralfs) ; 



12 and 13, x 520; 14, x 400 (after Ralfs) 



13 and 14, zygospores . . .154 

 1516. C. commissurale var. crassum Nordst. 15, x 



570 (after Nordstedt); 16, x 500 . . 155 



17_18._ C. dentiferum Corda, 17a, x 400 (after 

 Nordstedt); 176, x 350; 18, x 500. In 

 fig. 17 the granules in the centre of the semi- 

 cells are not indicated . . .156 

 19. C. WittrocMi Lund, x 400 (after Lundell) . 179 



