DASYA. 



decomposito-pinnate, patent; more or less densely clothed 

 with minute, slender, dichotomous, single-tubed, byssoid ra- 

 muli ; joints of the stem variable in length, 3 or 4 striate ; 

 the striae parallel. Harv. in Hook. Br. Fl. ii. p. 334 ; Wyatt, 

 Alg. Damn. No. 85; Harv. Phyc. Brit. t. cclxxxiv. Con/. 

 ?s, E. Bot. t. 547. 



On rocks, &c., in the sea. Annual. Summer. Abundant on the east- 

 ern and southern shores of England and Ireland ; rare in Scotland and 

 the west of Ireland. Frith of Forth, Dr. Richardson. Ayrshire, Mr. W. 

 Thompson. Bantry, Miss Hutchins. Malbay. Frond 4 12 inches long; 

 stem undivided, branched in a pinnate or bi-tripinnate manner ; branches 

 simple, attenuated, the lower ones longest, gradually diminishing upwards ; 

 the lesser divisions more or less densely clothed with slender, single tubed, 

 once or twice forked, spreading, byssoid fibres or ramuli, which give the 

 frond a beautifully feathery appearance. Substance sometimes rigid, and 

 the byssoid ramul'i squarrose ; sometimes soft and flaccid. Capsules ovate, 

 generally solitary. Colour a fine, clear red, which quickly becomes brown, 

 on exposure to the air, or in drying. 



VI. DASYA. Ag. [Plate 12, B.] 



Frond filamentous; the stem and branches mostly opaque, 

 irregularly cellular (rarely pellucid, longitudinally tubed), 

 composed internally of numerous parallel tubes surrounding 

 a central cavity ; the ramuli jointed, single-tubed. Fructifi- 

 cation twofold, on distinct plants ; 1, ceramidia, containing 

 a tuft of pear-shaped spores ; 2, lanceolate pods (stichidid), 

 containing tetraspores ranged in transverse bands. Name, 

 from Satrvf, hairy. 



I. D. coccinea, Huds. ; stems robust, hairy, distichously 

 branched ; branches bipinnate ; pinnula; multifid, their arti- 

 culations as long as broad. Hook. Br. Fl. ii. p. 335 ; Wyatt, 

 Alg. Danm. No. 41 ; Harv. Phyc. Brit. t. ccliii. Con/, coc- 

 cinea, E. Bot. t. 1055. 0. tenuior; more slender in all its 

 parts. Dillw. y. denudata ; branches naked, ramuli squar- 

 rose, minute, sub-simple. Ceramium patens, Grev. Crypt, t. 

 261. 



On rocks, &c., near low-water mark. . and y. dredged in 4 15 fathom 

 water. Annual. Summer. Stems 6 8 inches high, as thick as small 

 twine, rough with minute, hair-like fibres, a quarter of a line in length, 

 generally undivided, set with alternate, distichous, bipinnated branches, 

 which gradually become shorter upwards ; pinnule multifid. Stem and 

 branches inarticulate, the lesser pinnae imperfectly jointed, composed of 

 several tubes ; ultimate ramuli subulate, acute, single-tubed, jointed, the 

 joints short. Capsules at the base of the ramuli, ovate, slightly acuminate, 

 containing a round mass of unequal spores. Stichidia oblong-acumi- 

 nate, containing one or two rows of tetraspores. Colour a fine crimson, 

 becoming scarlet. Substance cartilaginous, imperfectly adhering to paper. 



