CHAETOPHORA ati 
I. CHAETOPHORA ELEGANS (Roth) Agardh, Disp. Alg. Suec. 42. 
1812; Syst. Ale 27. 1824. Lyngb. Tent. Hyd. Dan. 192 
(excl. syn.) M. 65. 1819. Hassall, Brit. F. W: Ale 127. ai 
9.5. 3, 4. 1845. Kitz. Spec. Ale 532. 1849; Tab. Phyc. 
3: pl. 20. f. 7. 1853. Rabenh. Flor. Eur. Ale 3: 384. 1868. 
Wood, F. ۷۷۰ Ale 210. AM. 6. f. 5. 1873. Cooke, Brit. F. ۰ 
Ale 194. pl. 78. f. 2. 1883. Wolle, F. ۷۷۰ Alg: 116. ai ۰ 
f. 4-10. 1887. DeToni, Syll. Ale 183. 1889. 
Rivularia elegans Roth, Neue Beitr. Bot. 1: 269. 1802.* 
(Ann. of Bot. 1: 259. 1805.) 
Batrachospermum intricatum Nauch. Hist. Conferv. 117. A. 72. 
| f. 2, 3. 1803. DeCandolle, Flore Franc. 2: 58. 1815. 
| Chaetophora longipila Kitz. Phyc. Germ. 261. 1845; Tab. 
Piye 3: M. r7. f. £ 1853. Wolle, P W: Alg: 118. $f. 103. 7. 
T6, 17. 1887.(2) ` 
C. cervicornis Kitz. Tab. Phyc. 3: 5. pl. 119. f. 2. 1853. 
C. elegans cervicornis Rabenh. Flor. Eur. Alg. 3: 384. 1868. 
| DeToni, Syll. Alg. 1: 183. 1889. 
C. elegans longipila Hansg. Prod. Ale Bohm. 1: 70. 1886. 
DeToni, Syll. Alg. 1: 183. 1889. 
Colonies globose or more often tuberculose, I-10 mm. in 
diameter, light green in color, the gelatinous substance rather soft, 
frequently confluent ; filaments radiating from the center, dichoto- 
| mously or trichotomously branched, penicillate at the summit ; 
| branches lax and somewhat spreading, above sometimes crowded 
and erect; terminal branchlets short pointed or setiferous ; cells 
of main branches about 8 زم 6-11( ےم‎ in diameter, 3-10 times as 
| long ; terminal cells 5-7 ۾‎ in diameter (ai 37). 
| Attached to leaves, sticks and stones, in brooks and stagnant 
waters. 
New York : Van Cortlandt Park, April-June (344, 602, 636) ; 
Botanical Garden, April (81, 274, 354), May (387), June (441, 
442); East Chester, May (392). 
New Jersey: Hudson Heights, April (302); Grantwood, 
March-May (4, 13, 367, 440); Greenwood Lake, September (465). 
WASHINGTON : Whidley Island, July, 1901 (N. L. Gardner). 
There is to be found in this species every degree of variation, 
from tiny globose specimens up to large tuberculose and con- 
* Citation from Roth, Cat. Bot. 3: 337. 1806. 
