PLATE XXI. 



Figures magnified 500 diameters. 



Page. 

 Figs. ] -3. CosMARiUM KiTCHELil, front, end and lateral views, . . 79 



'■ 4, 5. CosMARiUM 0HTH0«TICUM, front and lateral views, . . 86 



" 6, 7. CosMARinM SUBCEENATOM, front and lateral views, . . 91 



" 8, 9. CoSMABiUM QnADKATUM, front and end views, . . 63 



Fig. 10. " " larger form. . 63 



" 11. COSMARIUM ANCEPS, . . . .63 



Figs 12, 13. CosMARiUM PARvnLUM, 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. COSMARICM PSEUDONITIDUI.0M, .... 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. CosMABiUM 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. CosMAEiDM Seelyandm, front, end and side views, . . 80 



" 36, 37. CosMARiUM Hammeri, Var. inliated sides, . . 86 



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



Figs. 39-42. COSMARIUM obnatum, 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. CosMABiUM COMMISURALE, front and transverse views, . 91 

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

 tached, . . . .91 



