PLATE XXII. 



Figures magnified 500 diameters. 



PAGK. 

 Figs 1, 2. COSMAKIUM ELOISKANUM, front and end views, . . .92 



' 3-6. COSMARIUM TRIPLICATUM, front, lateral and end views, and 



zygospore, . . . .79 



" 7, 8. COSMARIUM SPECIOSUM, ..... 95 



Fig 9. " " smaller form, . .95 



Figs. 10, ll. COSMARIUM PYCNOCHONDRUM, front and lateral views, . 97 

 " 12, IS. COSMARIUM PECTINOIDES, front and side views, . . 9> 



" 14, 15. COSMARIUM SPECIOSUM, small variety, ... 95 



" 16-18. COSMARIUM PSEUDOPECTINOIDES; two in front view, one in side 



view, . . . 9<> 



Fig. 19. COSMARIUM NASUTUM, . . . . . . 9H 



" 20. COSMARIUM SUBCRENATUM. (Compare Plate XXI, figs. t>, 7), 91 



Figs. 21-22. COSMARIUM RADIOSUM, . . . . . .97 



" 23, 24. COSMARIUM BIREME, in three views, front, side and end, . 89 



" 25, 26. COSMARIUM MARGARITUM, in three views, . . .88 



Fig. 27. zygospore, with the remains of the 



semi-cells attached, . . 88 



Figs. 28-30. COSMARIUM TITHOPHORUM, from three points of view, . 88 

 " 31-33. COSMARIUM BLYTTII, front, side and end views, . . 95 



