PLATE XVI. 



Figures magnified 500 diameters. 



PACK. 

 Figs. 1, 2. COSMARIUM MARGARITJFEBUM ; normal, front view, and empty 



semi-cells, transverse view, . 81 



Fig. 3. zygospore with the empty semi- 



cells, . . . .81 



" 4. COSMARIUM PUNCTULATUM, ..... 81 



Figs. 5-7. COSMARIUM BOTEYTIS, three forms. (Compare Plate XXVII, 



fig. 27), 81 



" 8, 9. COSMARIUM OVALE, smaller and larger form, . . 62 



" 10, 11. COSMARIUM BREBISSONII, two forms, . . . .82 



Fig. 12. COSMARIUM INTERMIDIUM, ..... 83 

 " 13. COSMARIUM TETROPTHALMUM, . . . . .82 



" 14. COSMARIUM LATUM, ends too convex for typical form, . 84 

 " 15. COSMARIUM DENTATUM, . . . . . .83 



