PLATE XXI. 



Figures magnified oOO diameters. 



PAGE. 

 Figs. 1-3. COSMARIUM KITCHELII, front, end and lateral views, . . 79 



" 4, 5. COSMARIUM ORTHOSTICUM, front and lateral views, . . 86 



" 6, 7. COSMARIUM SUBCRENATUM, front and lateral views, . .91 



" 8, 9. COSMARIUM QUADRATUM, front and end views, . . 63 



Fig. 10. " " larger form, . . 63 



" 11. COSMARIUM AHCEPS, .... b'3 



Figs 12, 13. COSMARIUM PARVULUM, front and side views, . . .64 



" 14, 15. COSMARIUM SCHLEIPACHEANUM, front and end views, . 89 

 " 16-18. COSMARIUM NITIDULUM; a form; ends not usually so convex, 72A 



Fig. 19. COSMARIUM PSEUDONITIDULUM, .... 72A 



" 20. COSMARIUM TUMIDUM, a coarsely granulate variety, . . 82 



Figs. 21, 22. CosMARruM SUBLOBATUM, ..... 87 



" 23, 24. COSMARIUM CRUCIATUM, front and end aspect, . . 89 



" 25, 26 COSMARIUM RETUSUM, front and end aspect, . 88 



Fig 27. COSMARIUM HAMMERI, Var. intermedium, . , .86 



Figs. 28-30. COSMARIUM PHASEOLUS, three views, ... 89 

 " 31,32, smaller variety ; zygospore with husks 



of cells attached, ... 89 



" 33-35. COSMARIUM SEELYANUM, front, end and Bide views, . . 80 



" 36, 37. COSMARIUM HAMMERI, Var. inflated sides, ... 86 



Fig. 38. zygospores with remains of cells, . 86 



Figs. 39-42. COSMARIUM ORNATUM, two sizes, four views, . . 89 



" 43-45. a variety, front, side and end views, . 89 

 " 46-48. COSMARIUM CAELATUM, front and side views; transverse view 



of an empty semi-cell, . . .93 



" 49, 50. COSMARIUM COMMISURALE, front and transverse views, . 91 



Fig. 51. zygospore, husks of cells not de- 

 tached, . . . .91 



