Puate LVIIL 2: 
CALOTHRIX SCOPULORUM, 4. 
CaLoTurix scopulorum; stratum velvetty, dirty green, of indefinite extent ; 
filaments flexuous, subulate, sub-attenuated, simple. 
Carorurix scopulorum, Ag. Syst. p.710. Harv. in Hook. Br. Fl. vol. ii. p. 368. 
Harv.in Mack. Fl. Hib. part 3. p. 2387. Harv. Man. p. 157. 
OscILLATORIA scopulorum, 4g. Syn. p. 111. Hook. Fl. Scot. part 2. p. 79. 
Grev. Fl. Edin. p. 304. 
Conrerva scopulorum, Web. et Mohr, Reis. p.195. t. 3. f. a, 6. Roth. Cat. 
Bot. vol. iii. p. 191. Dillw. Conf. Introd. p.39. Suppl. t. A. #. Bot. t. 2171. 
Has. On marine rocks, near high water mark. Common. 
Geroar. Distr. Shores of Europe; and probably dispersed throughout the tem- 
perate zones. 
Descr. Stratum of indefinite extent, dark, dirty green, slippery. Filaments a 
line in height, flexuous, often very much curled, subulate, tapering to a 
more or less acute point, crowded, tufted, the tufts glued together at the 
base by a slimy matter, simple. Sé/7@ sometimes indistinct ; sometimes 
well-defined and very close. Colowr, under the microscope, a dull, yellowish 
green. 
— _— 
This forms slimy patches, very treacherous to unwary feet, on 
the surface of rocks near high-water mark, often growing in 
places where it is only wet by the splashing of the sea, or only 
covered at spring tides, and where it is much within the influence 
of rain. It is found on all our shores, on rocks of every geo- 
logical character indifferently, and is probably to be met with m 
similar situations all over the world. It was first detected m 
Sweden, by Weber and Mohr, and introduced to the notice of 
British botanists by Mr. Dillwyn. 
B. Fig. 1. Catorarrx scoputorum. Portion of the stratum :—the natural size. 
2. A tuft of filaments. 3. Apex ofa filament :—doth magnified. 
