PLATE V. 

 Figures magnified .inn diameters. 



Pehium Digitus; front view and transverse section, . . 34 



I'kniim i i; U38 a, four specimens, .... 37 



I'KNIIM LAMELL06UM, . . .34 



1'knii m KUBGABrTACEUM ; empty cell, . . .34 



" ti. sygospore with empty cells attached, 34 



" 7. I'kniim Brkbihsonii, zygospore and remains of cells, . 36 



' s. vegetative cell, . . .36 



FigB. '.', 10. I'kniim tbuncatum, and zygospore with husk- <>t cell-.. . 35 



Fig. 11. I'kniim habgabitaceum, vegetative cells, . . .34 



12. I'kniim polymobphum; group of four, . .36 



13. I'kniim bupestbe; two cells, .... 37 



" II. I'imim iNTKKKfiTfM, (larm- form), .... 36 



" 15. " " -mall form, .... 35 



' it>. I'kniim N wini. a, two sizes of cells, . . . .36 



' 17. I'i mim OBLONGUM, ...... 34 



18. I'imim CLOOTBBIOIDES, ...... 35 



Figs. 19, 20. I'kniim miniti m, ...... 35 



" '21, '2-. I'imim iki maum, a variety of Fig. 10, . .35 



