114 SIPHOPHYCES. 
Farther modes of increase are— 
5. Cell division. 
6. Formation of spores. 
7. Formation of zoospores. 
This plant possesses also fivefold resting stages— 
1. Of the asexual zoospores laid in water—for months. 
2, Of the root cells—the year throughout in which they 
originated. 
3. Of the hypnosporanges—the year throughout in which they 
originated. 
4, Of the spores—for years. 
5. Of the isospores—at least over the year in which they 
originated. 
Plate LXV., Botrydium granulatum. Fig. 1, plants of the natural 
size. Fig. 2, zoosporangium X 30. Fig. 3, the same, five hours after- 
wards, with the zoospores escaping at the apex, X 30. Fig. 4, zoospores 
x 520. Fig. 5, differentiation of the plasma in the root, and the forma- 
tion of root cells, X 30. Fig. 6, root cells in water producing zoospores 
x 160. Fig. 7, the resulting 2 zoospores X 520. Fig. 8, the same, 24 hours 
after swarming, X 520. Fig. 9, the same, four days later, X 520. Fig. 
10, the same, eight days later, x 520. Fig. 11, copulating swarmspores 
X 520. Fig. 12, zoospores derived from a spore, after six and a half 
hours, X 160. Fig. 13, sexual swarmspores in conjugation X 520. Fig. 
14, isosPpores, 24 hours old, X 520. Fig. 15, stellate isospores, more than 
a day old, x 520. Fig. 16, young plant resulting from vegetation of 
isospore. All after Rostafinski and Woronin. 
Botrydium granulatum. inn. 
Usually gregarious, often aggregated, rarely confluent; cells 
globose, pyriform, size of a poppy seed, or mustard seed, or 
larger, leek-green, apparently pulverulent, 
Botrydium granulatum, Jenn. Fl. Tunb. Wells 176, Parfitt 
in Grevilleai., p. 10. Eng. Fi. v., p.321. Harv. Man. 150. 
Kirsch. Alg. Schl., p. 84. Trans. Bot. Soc. Edin, vi., 424. Eng. 
Bot. ii., p. 127, t. 2422. Hass. Alg. t. 77, f. 5. 
Hydrogastrum granulatum, Rabh. Alg. Eur. iii, 265. Desv. 
Fl. Ang. 19. 
Lichenoides fungiforme, Ray Syn. iii., p. 70. 
Tremella palustris, Dillen. Hist. Muse. 55, t. x., f. 17. 
Botrydium argillaceum, Grey. Alg. Brit., p. 197, t. 19. Kutz, 
Tab. vi., t. 54. 
Vaucheria granulata, Grev. Fl. Ed. 306. Gray. Arr. i., 290. 
Vaucheria radicata, Hook. Fl. Scot. ii., 93. 
Vaucheria multicapsularis, Harv. Man. 149. Gray Arr. i, 
252 (2 
hs, granulata, Lightf. Fl. Scot. 976. Hull. Brit. Fl. 309. 
Tremella granulata, Huds. Fl. Ang. 566. With. Arr, iv., 
80. Eng. Bot. i., t. 3824. 
On the ground in swampy places. 
“The plant about 13 mm. diam. ; the upper portion, or that above 
ground, globular, gradually narrowing downwards, and passing into one 
