PLATE IV. 



Figures magnified 500 diameters. 



PAGE. 

 Figs. 1, 2. SPHAEROZOSMA PDLCHRUM, filament enveloped in a colorless 



gelatinous sheath ; the irregular 

 breadth is produced by the twist of 

 the filament, . . .29 



" 3,4, " " Var. planum, ... 29 



" 5, 6. SPHAEROZOSMA FIUFORME, . . . . .29 



Fig. 7. SPHAEROZOSMA SERRATUM. See also Plate X LI 1 1, . 30 



" 8. SPHAEROZOSMA EXCAVATUM, with gelatinous sheath, . . 30 



" 9. " " with sheath partially dispersed, 29 



Figs. 10 12. " " developed spores with empty cells 



attached, . . . .29 



Fig. 13. SPHAEROZOSMA VEBTEBRATUM J with a decided twist, . 30 

 " 14. SPHAEROZOSMA SPINULOSUM? . . . . .31 



" 15. SPHAEROZOSMA WALLACHII?. ... 31 



For additional varieties see 



Plate LX. 8. PULCHRUM, Var. inflatum, . . .29 



Plate XLVII. S. var. CONOTEICTUM, . . Addenda, 172 



Plate- LX. 8. RECTANGULARE, . . . .31 



Plate XII. 8. PULCHELLUM, . .29 



Plate XLVII. 8. MONIIJFORME, . . . .30 



Plate XLIII. 8. NORDSTEDTIAHA, ... 31 



