186 NEMATOPHYCES. 
Trentepohlia aurea, Ag. Syst. p. 36. 
Ectocarpus aureus, Lyngb. Hydro. Dan. t. 44. Grev. Fl. 
lid. 315. 
On walls, rocks, chips, bark, &. 
Plate LXXII. fig. 1. Portions of filaments X 400 a, zoospor- 
angium ; 4, zoospore; c, same at rest ; d, germinating zoospore. 
Chroolepus odoratus. (Lyngb.) Ag. Syst. 35. 
Stratum thin, rather tomentose, rufous-tawny (when dry 
cinereous, becoming greenish). Threads and branches abbre- 
viated, erect, parallel, flexuously curved, torulose ; cells equal 
or twice as long as their diameter. 
Size. Cells 02-025 mm. diam. 
Eng. Fl. v., 381. Harv. Man. 190. Rabh. Alg. Eur. iii., 
372. 
Conferva odorata, Lyngb. Hydr. Dan. t. 57. Johnst. Fi. 
Berw. ii., 245. 
On the bark of various trees, especially of Birch and 
Poplar. 
Plate LXXII. fig. 2. Portion of thread of Chroolepus odoratus x 400. 
Chroolepus Iolithus. (Linn.) Ag. Syst. p. 34. 
Stratum thin, or a line thick, reddish-orange, glaucous or 
dirty greenish when dry, threads and branches elongated, rather 
dichotomous, variously curved, ascending ; cells one and a half 
or three times as long as their diameter, in the upper portion 
of the branches reaching to double that proportion. 
Size. Cells -025-:04 mm.diam. Zoosporangium ‘05 mm. 
diam. 
Eng. Fl, v., 380. Eng. Bot. ii, p. 189. Harv. Man, 189. 
Mace Hib. 246. Rabh. Alg. Eur. iii., 373. 
Byssus Iolithus, Linn. Spec. 1638. Hull. Br. Fl. 308. 
Olivia violacea, Gray. Arr.i., 850. 
Trentepohlia Tolithus, Wallr. ‘Comp. iv. 151. 
On rocks, in moist places. 
Plate LXXII. fig.4. Portion of thread of Chroolepus Jolithus x 400; 
a, zoosporangium x 400. 
Chroolepus ilicicolus. Eng. Bot. u., t. 2529. 
Filaments erect, alternately branched, forming tufts of a 
permanent tawny-yellow. Cells nearly as long as broad. 
Size. Cells about ‘03 mm. diam. 
Conferva ilicicola, Eng. Bot.1., t. 1639. 
