213. POLYIDES.
1. P. lumbricalis.
Agardh, Syn. 392; P. rotundus, Gr. Algae, 70; Berwick Flora, ii. 233; Fucus rotundus, Eng. Bot. 1738; Turn. Hist. t. 5; Ner. Brit. 15, t. 6.
On rocks and stones on the coast, not rare. Near Berwick — Dr. G. Johnston.
214. DUMONTIA.
11. D. filiformis.
Gr. Algae, 165; Berwick Flora, ii. 246; Halymenia filiformis, Agardh, Syn. 214; Chondria purpurasecus, Gr. Fl. Eds. 290; Ulva purpurascens, Eng.
Bot. 641.
On rocks in pools left by the tide, frequent.
215. CHORDA.
1. C. Filum.
Gr. Algae, 47; Berwick Flora, ii. 247; Scytosiphon Filum, Agardh, Syn. 161; Fucus Filum, Eng. Bot. 2487; Turner, Hist. t. 86.
On the coast in deep water.
216. ASPEROCOCCUS.
1. A. echinatus.
Gr. Alga, 50; Berwick Flora, ii. 248; Encoelium Lyngbyanum, Gr. Crypt. Fl. t. 290; Fistularia attenuata, Gr. Fl. Eds. 300; Ulva fislulosa, Eng. Bot. 642.
On the beach at. Manhaven near Whitburn, D. Near Cullercoats, N. At Berwick. — Dr. G. Johnston.
217. PUNCTARIA.
1. P. plantaginea.
Gr. Algae, 53; Berwick Flora, ii. 248; Zonaria plantaginea, Sprengel, Syst. Veg. iv. 326; Ulva plantaginea, Eng. Bot. 2136.
On rocks near Berwick. — Dr. G. Johnston.
218. ZONARIA.
1. Z. deusta.
Spreng. Syst. Veg. 327; Berwick Flora, ii. 248.
On rocks near high-water mark in Berwick Bay, frequent. — Dr. G. Johnston, who considers it Zonaria parvula of Greville, in a mature state.
219. PORPHYRA.
1. P. laciniata.
Gr. Algae, 168; Agardh, Syn. 190; Ulva laciniata, Berwick Flora, ii. 249; Lightfoot, 974, t. 33, U. umbilicalis, Eng. Bot. 2286.
On rocks and stones on the coast, N. and D.
2. P. vulgaris.
Gr. Algae, 169; P. purpurea, Agardh, Syn. 191; Ulva umbilicaris, var. elongata, Gr. Fl. Eds. 299.
On rocks and stones on the coast, N. and D.
220. ULVA.
1. U. latissima.
Gr. Algae, 171; Agardh, Syn. 407; Berwick Flora, ii. 250; U. Lactuca, Eng. Bot. 1551; Gr. Fl. Eds. 299; U. Lactuca, var. latissima, Lightfoot, 971.
On stones and rocks, frequent, N. and D.
2. U. Lactuca.
Agardh, Syn. 409; Gr. Crypt. 313; Algae, 172; Berwick Flora, ii. 250.
On rocks on the coast, abundant.
3. U. linza.
Agardh, Syn. 412; Gr. Fl. Eds. 299; Algae, 173. β lanceolata, Dill. t. 9, f. 5.
On the beach near Hartley, N. Near Sunderland, D. At Hartlepool, D.— J. Hogg, Esq.
4. U. bullosa.
Agardh, Syn. 414; Eng. Bot. 2320; Hook. Fl. Scot. 91; Berwick Flora, ii. 250; Gr. Algae, 174; A. lactuca β, Lightfoot, 971; Hudson, 567.
In ditches at Jarrow Slake, D. In ponds in the Magdalen Fields at Berwick. — Dr. G. Johnston.
5. U. crispa.
Agardh, Syn. 416; Lightfoot, 972; Berwick Flora, ii. 250; Gr. Algae, 175; Tremella crispa, Northumberland and Durham Guide, ii. 67; T. terrestris, Dill. t. 10, f. 12.
On old walls near Harton and Sunderland, D. On old walls and on the roofs of cottages, N. and D. On the ground in East Common Wood near Hexham, N. Near Berwick Dr. G. Johnston.
6. U. calophylla.
Berwick Flora, ii. 251; Spreng. Syst. Veg. iv. 368; Gr. Algae, 176; Bangia calophylla, Crypt. t. 220.
On rotten wood near Berwick, mixed with Conferva muralis. — Dr. G. Johnston.
221. ENTEROMORPHA.
1. E. intestinalis.
Gr. Algae, 179; Fistularia intestinalis, Gr. Fl. Eds. 300; Ulva intestinalis, Agardh, Syn. 418; Dill, t. 9, f. 7; Berwick Flora, ii. 249.
In Jarrow Slake and Coble Dene, on the Tyne, N. In the Tweed. Thompson's Berwick Plants. In the Wear near Southwick and Pallion, D.
2. E. compressa.
Gr. Algae, 180; Fistularia compressa, Fl. Eds. 300; Ulva compressa, Agardh, Syn. 420; Eng. Bot. 1739; Berwick Flora, ii. 249; Dill. t. 9, f. 8.
On the sea coast, not rare.
222. BRYOPSIS.
1. B. plumosa.
Agardh, Syn. 448; Ulva plumosa, Eng. Bot. 2375; Gr. Algae, 187.
In rocky basins on the coast at Whitburn, Seaton, and Hartlepool, D. At Berwick. — Dr. G. Johnston.
223 VAUCHERIA.
1. V. terrestris.
Gr. Algae, 191; Berwick Flora, ii. 251.
Under shelving rocks on the coast near Berwick. —Dr. G. Johnston.
2. V. caespitosa.
Gr. Algae, 194 : Berwick Flora, ii. 251; Conferva amphibia, Dillwyn. t. 41.
Common on mill dams, and wherever wood is exposed to the dropping of water.
3. V. geminata.
Gr. Algae, 139, t. 19, f. 3; Berwick Flora, ii. 1 52; Eng. Bot. 1766.
In ditches near Berwick. — Dr. G. Johnston.
