Bangia.] ALG.E CHLOROSPERME^. 241 



seeds; 2. roundish granules, mostly arranged in a quater- 

 nate manner, and covering the whole frond. Grev. — Name ; 

 7rop<fivpos, purple. 



1. P. laciniata, Ag. Torn Purple Laver or Slouk. Fronds 

 deeply and irregularly cleft, with broad segments; margin va- 

 riously cut and waved. Hook. Br. Fl. v. ii. p. 310. — Ulva 

 umbilicalis, E. Bot. t. 2296. 



On rocks in the sea, common. 



2. P. vulgaris, Ag. Simple-waved Purple Laver. Frond 

 simple, broadly lanceolate, the margin much waved. Hook. Br. 

 Fl. v. ii. p. 310. 



Rocks in the sea with the last, but (in Ireland) much less common. 



3. P. linearis, Grev. Narroiu Purple Laver. Frond linear 

 or linear-lanceolate, acute, the margin rarely flat. Grev. — 

 Hook. Br. Fl. v. ii. p. 31 1. Grev. Alg. t. 18. 



Marine rocks ; reaching perfection in the winter months. Dunmore, 

 near Waterford ; Miss A. Taylor. Miltown Malbay.— A beautiful 

 and distinct species, 3—5 inches high, and rarely half an inch broad. 



77. Bangia. Lyngb. Bangia. 



Frond flat, capillary, membranaceous, of a green, reddish or 

 purple colour. Fructification: granules arranged more or 

 less in a transverse manner. Grev. — Named in honour of 

 Hoffman Bang, a Danish Naturalist. 



1. B. fusco-purpurea, Lyngb. Brownish-purple Bangia. 

 Filaments elongated, decumbent, nearly straight, equal, forming 

 a brownish or purple stratum, glossy ; granules few (about 5) 

 in each fascia. Hook. Br. FL v. ii. p. 316. — Conf. fusco-pur- 

 purea, Dillw. t. 92. E. Bot. t. 2055. also C. atro-purpurea, 

 Dillw. t. 103. E. Bot. t. 2085. 



Marine rocks, rare. Bantry ; Miss Hutchins. 



2. B. ? latevirens, Harv. Bright-green Bangia. Filaments 

 minute, tufted, flexuose, attenuated to a sub-obtuse point, 

 bright-green ; fasciae close, composed of innumerable minute 

 granules. Harv. in Hook. Br. Fl. v. ii. p. 317. 



On old fronds of Enteromorpha intesiinalis, near high-water mark, 

 Miltown Malbay. 



3. B.? Laminarice, Lyngb. Laminar ia Bangia. Filaments 

 simple, casspitose, equal, olive- green ; granules minute, arranged 

 in a double series of about four. Hook. Br. Fl. v. ii. p. 316. 

 Lyngb. Dan. t. 24. 



Parasitical on Alalia esadenta at Arran ; Mr: Jt. Ball and Mr. 

 W. Thompson. 



2 G 



