PLATE XLXIX. 



Figures magnified 500 diameters 



Page. 

 PhYMATODOCIS NORDSTEDTIAITUM, . . . .28 



" " a evil dividing, . 28 



transverse view, and front 

 view of a cell, . 28 



DESMIDIUM (JDidymoprium) QUADRATUM, front and side views 



made evident by the 

 twisl of the filament, 26 

 " 6. Desmidium (Dutymoprium) LONGATUM, front and side view of 



cells, . . . 26 



" 7. Desmidium aptogonium, partially advanced in process of divi- 



sion. Compare normal condition, 

 Plate II, fig. 6, . . .27 



' 8. Sphaerozosma pulchrum, Var. inflatum, . . . 29 



" 9. Sphaerozosma rectangudare, . . . .31 



' LO. Calocylindrus pseudoconnatus, Var. Compare Plate XII, 55 



" 11. - na! view, . . ">"> 



' 12. ( OSMARH M OBSOLET1 M. Var. major, . . . 64 



" 13. < !oSM LRIUW SEX VNGULARE, . . . . 63 



Figs. It 17. I l08W \i:i! \l GLOBOSUM, ..... 'ill 



Fig. 18. Calocylindrus connatus, Var. minor, . . . ">"> 



" 19. Cosmarii M K.i i:i.i.m ami, . .... 87 



Figs. 20, 21. ' " end and side view, . . .87 



Fig. 22. Cosmarium ornatum, Var. protractum, . . . 82 



Figs. 23, 24. " " front and side view, . . .82 



Fig. 25. Cosmarium pulcherrimum, Var. minor, . . . 90 



Figs. 26, 27. " " sid,. anil end view, . . 90 



Fig. 28. Cosmarium Sportella, ..... 83 



29, .'in. " " lateral aial vertical view, . . 83 



' 31,32. Cosmarium crenatum, ..... 67 



