Calothrix.] ALG.E CHLOROSPERME^E. 237 



which turns to a dull green in drying. Carm. Harv. in Hook. 

 Br. Fl. v. ii. p. 366. 



On moist shady rocks, at the foot of Turk Mountain, Killarney. 



73. CALOTHRIX. Jig. Calothrix. 



Filaments (destitute of a mucous layer), erect, tufted or fasci- 

 culate, fixed at the base, somewhat rigid, without oscillation. 

 Tube continuous ; cndochrome green, densely annulated, at 

 length dissolved into lenticular sporidia. Name ; icaXo?, 

 beautiful, and Opi^ a hair. 



1. C. confervicola, Ag. Glaucous parasitical Calothrix. Fi- 

 laments minute, glaucous, erect, subulate, rigid, fasciculate. 

 Harv. in Hook. Br. Fl. v. ii. p. 367. Conf. confervicola, Dillw. 

 t. 8. E. Bot. t. 2576. 



On marine filamentous Algae, common. 



2. C. scopulorum, Ag. Simple Rock Calothrix. Filaments 

 minute, erect, curved, flexuose, simple, sub-attenuate, dirty- 

 green, agglutinated at the base, forming a continuous velvetty 

 stratum. Harv. in Hook. Br. Fl. v. ii. p. 368. Conf. scopu- 

 lorum, Dillw. Suppl. t. A. E. Bot. .2171. 



On rocks in the sea, near high-water mark, common. 



3. C. fasciculata, Ag. Branched Rock Calothrix. Fila- 

 ments erect, very straight, dark green, subulate, with a seta- 

 ceous point, fasciculately pseudo-branched, forming a continuous 

 velvetty stratum. Harv. in Hook. Br. Fl. v. ii. p. 368. 



Marine rocks. Miltown Malbay ; rare. Perhaps this is only a 

 more fully developed state of the preceding. 



4. C. interrupta, Carm. Variegated Calothrix. Filaments 

 thick, subulate, coriaceous, glaucous-green, short, cohering in 

 tooth-like fascicles, and forming broad tufts. Harv. in Hook. 

 Br. Fl. v. ii. p. 368. 



On mosses and lichens. Killarney, not rare. 1 2 lines high, 

 forming remarkably tough and rigid tufts. 



5. C. distorta, Ag. Large Verdigris Calothrix. Filaments 

 elongated, bluish-green, forming large tufts, mucous, somewhat 

 rigid, branched ; branches erect, flexuose. Harv. in Hook. Br. 

 Fl. v. ii. p. 369. Conf. distorta, Dillw. t. 22. E. Bot. t. 2577. 



In ditches, &c. investing aquatic plants. Bantry ; Miss Hutchins. 

 Tufts an inch long. Filaments slender, fine bluish-green. 



6. C. ccespitula, Harv. Globular tufted Calothrix. Fila- 

 ments forming close convex tufts, blackish-green, flexuose, 

 flaccid, obtuse, here and there spuriously branched. Harv. in 

 Hook. Br. Fl. r. ii. p. 369. 



Marine rocks, very rare. Miltown Malbay. Tufts convex, - I 



