214 CHAETOPHORACEAE 
so troubled ; possibly the peculiar consistence of the gelatinous in- 
vestment makes the two former species better fitted for sheltering 
animal inhabitants. Furthermore in both stations C. attenuata 
harbored the same species of rotifer, while a different species is 
found in C. pisiformis. 
4. Chaetophora incrassata (Hudson). 
Ulva incrassata Hudson, Flor. Ang. 572. 1778 [Ed. 2]; 
Eng. Bot. A. 967. 1802. 
Chaetophora lobata Schrank. Der Naturf. 19: 126. 1783; 
Baier. Flor. 2: 491. 1789. 
Rivularia Cornu-Damae Roth, Cat. Bot. 1: 212. pl. 6. f. 2. 
1797; Ann. of Bot. 1: 256. 1805. 
Rivularia endiviacfolia Roth, Romer’s Archiv f. Bot. 1°: 51. 
1798; Cat. Bot. 2: 249. 1800; Ann. of Bot. I: 257. 1805. 
Tremella palmata Hedwig, Com. Trem. Nost. 70. کر‎ 4-7. 1798. 
Conferva incrassata Bosc, Bull. Sci. Soc. Phil. 2: 145-6. A. 
II.f. 2. A-C. 1800. 
Batrachospermum fasciculatum Vauch. Hist. Conferv. 116. ۰ 
£474 1,24 X803. 
Myriodactylon incrassatum Desvaux, Journ. de Bot. 2: 307. 
1809. 
Chaetophora endiviviaefolia Agardh, Disp. Alg. Suec. 42. 
: 1812. Lyngb. Tent. Hyd. Dan. 191. AM. 65. 1819. Hassall, 
Dre POW. Bla i45 087. 7, 2 1845. Kil. Spec Alg 
532. 1849; Tab. Phyc. 3: A. 27. 1853. Harvey, Ner. Bor. 
Am. 3: 69. 1853.  Rabenh. Krypt. Flor. Sachs. 1: 272. 1863. 
Wood, Hist. F. W. Alg. 210. 1873. Cooke, Brit. F. W. Alg. 
194. pl. 78. f.2. 1883. Wolle, F. W. Ale 117. M. 104. 
1887. 
Rivularia incrassata Purton, Midl. Flor. 3: 179. 1817. [fide 
Cooke. | 
Chaetophora Cornu- Damae Agardh, Syst. Alg. 29. 1824. De- 
Toni, Syll. Alg. 1: 187. 1889. Saunders, Flora of Neb. 1: 64. 
p. 17. f. 21. 1894. 
Chaetophora clavata Hornem. Flor. Dan. pl. 7728. f. 2. 1831. 
Batrachospermum Americanum Schweinitz, MS. 
Chaetophora Schweinitzü Bailey, MS. 
