A. Fig. 1. PoysrpHonta opscura; part of a patch :—of the natural size. 2. 
Portion of a creeping filament :—moderately magnified. 3. Portion of a 
branch. 4. Cross section of the same :—oth highly magnified. 
Puate CII. B. 
POLYSIPHONIA PULVINATA, Spreng. 
PotysipHonia pulvinata ; filaments rising from a mass of creeping fibres, 
tufted and interwoven, short, very slender, flexuous, sparingly and 
irregularly dichotomous, more or less furnished with very patent or re- 
curved, simple ramuli; articulations of the main branches three or 
four times as long as broad, of the ramuli very short, four-tubed ; 
capsules wrn-shaped, stalked. 
PotysipHonta pulvinata, Spreng. Syst. Veg. vol. iv. p. 350. J. Ag. Aly. 
Medit. p. 124. Mont. Fl. Canar. p. 172. Endl. 3rd Suppl. p. 44. 
Harv. Man. p. 94. Wyatt, Alg. Dann. no. 215. 
PoLysIPHONIA macrocarpa, Harv. in Mack. Fl. Hib, part 3. p. 296. 
Hurcuinsia pulvinata, 4g. Sp. Alg. vol. ii. p. 109. 
Conrerva pulvinata, Roth. Cat. vol.i. p. 187. t. 3. f. 4. vol. ii. p. 214. 
Has. On rocks in the sea, between tide marks. Annual. Not uncommon. 
Miltown Malbay, VW. H. H. Port Stewart, Mr. D. Moore. Ifra- 
combe and Torbay, Mrs. Griffiths. Salcombe, Lands-Knd and Mount’s 
Bay, Mr. Ralfs. Balbriggan, Wiss Gower. Saltcoats, Mr. D. Lands- 
borough, Jun. Ardrossan, Major Martin. 
Guoer. Distr. Atlantic and Mediterranean coasts of Europe. Canary Islands. 
Descr. Filaments rising from creeping fibres, densely aggregated in roundish, 
fastigiate tufts, about an inch in height, very slender and flaccid, flexu- 
ous, irregularly branched; branches more or less dichotomous, furnished 
irregularly with scattered, alternate or now and then secund, very patent, 
or divaricating, short ramuli, which are mostly simple, occasionally 
subdivided. Articulations variable in length; those of the main divi- 
sions three to four times, of the lesser branches twice or thrice, and of 
the ramuli half as long as broad, all marked with two broad, coloured 
bands, and composed of four tubes radiating round a central cavity. Cap- 
sules large in proportion to the diameter of the filaments from which they 
spring, urn-shaped, with a contracted orifice, borne on short lateral stalks. 
Tetraspores imbedded in the ramuli in a single row. Colour a dark red- 
brown. Substance soft and somewhat gelatinous, closely adhering to paper. 
Penne 
This resembles P. wrceolata in miniature, but has the soft 
substance of P. fibrata, and is a much more slender plant. 
B. Fig. 1. PotystpHonra PULVINATA; a tuft:—of the natural size. 2. Por- 
tion of a filament :—moderately magnified. 3. A vamulus with te¢raspores. 
4. Portion of a branch, with capsule. 5. Transverse section of a branch : 
all highly magnified. 
