PLATE LX. 



Figure's inatfiiififil .VKt <liain>'t' TV 



1'AI.K. 



Fig. 1. PHYMATOIXXUS NOKDSTEDTIANUM, . . . .28 



" 2. " " a cell dividing, . . 28 



Figs. 3, 4. transverse view, and front 



view of a cell, . . 28 



Fig. 5. DE^MIIHTM (Dulynwpi-ium) QUADRATUM, front and side views 



made evident by the 

 twist of the filament, 2tf 

 " 6. DGBMIDIUM (Didymoprium) LOXGATUM, front and side views of 



cells, . . . '27 



" 1. DESMIOIUM APTOGONIUM, partially advanced in process of di- 



vision. (Compare normal condition, 

 Plate II, tig. 6), . . 27 



" 8. SPHAEROZOSMA PULCHRUM, Var. inflatum, ... 29 



" 9. SPHAEROZOSMA RECTANGULARE, . . . .31 



" 10. CALOCYLINDRUS PSEUDOCONNATUS, Var. (Compare Plate XV), 60 

 " 12. COSMARIUM OBSOLETUM, Var. major, . . . .70 



" 13. CoSMARICM SEXANGULARE, .... H9 



Fit;8. 14-17. C'OSMARJUM GLOBOSOM, . . . . . .65 



Fig. 18. COLOCYLINDRUS coNNATUS, Var. minor, ... 60 



" l!. COSMARIUM KJELLMANII, . . . 94 



Figs. 20, 21. end and side views, . 94 



Fig. 22. COSMARIUM ORNATUM, Var. protractum, . . .90 



Figs. 23, 24. " " front and side vies, . . 90 



Fig. 25. COSMARIUM PULCHERRIMUM, Var. minor, . . . ( J7 



Figs. 26, 27. " " side and end views, . . 97 



Fig. 28. COSMARIUM SPORTELLA, . . . . . .90 



Figs. 29, 30. " " lateral and vertical views, . 90 



" 31, 32. COSMARIDM CRENATUM, . . . . . .73 



