312 CATAT.OGUE OF THE MARINE ALGJE 



Abundant on the muddy margin of Budle Bay, Holy Island, 

 &c. — G. S. B, It is very doubtful whether this and the pre- 

 ceding species are really anything more than varieties of E, com- 

 presses — N. 



75. ULVA, Linn. 



1. U. LATissiMA, Linn, Harv. Man., p. 216. Phyc. Brit., t. 



171. Atlas, PI. LXXIIL, fig. 342. Johnst. 

 and Cr., t. 202. 

 JJlva lactuca. E. Bot., t. 1551. 

 Abundant on rocks, stones, and Algas, between tide marks. — 

 N D. 



2. U. LACTUCA, Linn. Harv. Man., p. 216. Phyc. Brit., t. 243. 



Atlas, PI. LXXIII., fig. 343. Johnst. and Cr., 



t. 203. 

 On rocks, corallines, &c., between tide marks: occurring all 

 along the coast, but by no means so plentiful as the preceding. 

 ~N. D. 



3. U. LiNZA, Linn. Harv. Man., p. 216. Phyc. Brit., t. 39. 



Atlas, PI. LXXIII , fig. 344. E. Bot., t. 2755. 

 Johnst. and Cr., t. 204. 

 On rocks between tide marks, occurring at many places on the 

 coast, but nowhere very abundant. It is generally found above 

 half-tide level, not solitary, but covering the bottom of the pools 

 with its lanceolate fronds; these have a singularly beautiful 

 appearance as they wave to and fro in the water. — N. D. 



7G. POKPHYRA, Ag. 



1. P. LAcmiATA, Ag. Harv. Man., p. 216. Phyc. Brit., t. 92. 

 Athis, PI. LXXIIL, fig. 345. Johnst. and Cr., 

 t. 205. 

 Ulvaumhilicalis. E. Bot., t. 2286. 

 On rocks, &c., in the sea. Very common. — N. D. 



