PLATE XLV. 



Figures magnified 500 diameters. 



Page. 

 -.1 3. Staurastrum \ ri.i vitm, in three aspects, . . . 140 



Fig. 4. Staurastrum teliferum. normal size, .140 



">.'>. Si \i i:\-ri:i \i Brebiksoxii, ..... Ml 



7, 8. Staurastrum cerberus, . . . . . 142 



9,10. Staurastrum i kii>i.\ i n : ri m. . . . . .142 



11-13. Staurastrum cruclatum, . . . . . 142 



14 l"i. Si \i &ASTR1 M HYSTRDt, ...... 14li 



17,18 Staurastrum Raven elii, Compare Plate LII, figs. 7, 8, - L43 



I i_. 19. 3 IURAS1 in M 1 1 1 : ~ I I i M. . . 1)1 



dividing, , . .Ill 



" 21. spore with empty cells attached, 141 



Figs. 22, 23. Staurastrum sociatum, ..... 142 



2 l, 25. Staurastri m controversum, .... 1 !"> 



26,27. Staurastrum setioerum, . . .Ill 



Fig. 28 Staurastrum vestitum, zygospore with remains of cells, L38 



Figs. 29, 30. " large form, front and end view, . 138 



31,32. Staurastrum echinatum, front and end view, . . 141 



33,34 Staurastrum Saxonicum, front and end view, . . 141 



- 35,36. Staurastrum pe< raw, front and end view, . . .141 



