114 COMMON SEAWEEDS. 



the album. A little bunch of tangled green threads 

 may be Cladoplwra Rectangular is. It is very rare in 

 some parts of our coast ; and if you find it, float it 

 out carefully, and recognize it by the green-jointed 

 branched filaments, at right angles from the main 

 stem, and with regular, opposite, lesser branches : 

 the colour is rich grass green, and it makes a pretty 

 specimen. Look for the crimson ~PtiIota, the scarlet 

 Dasya, the rich red Delesseria, and pink Nitophyl- 

 lum. Tufts may be left by any wave of the bright 

 Plocamium ; and fail not to drag up high and dry the 

 stems of Laminaria for quiet research. "We must 

 notice the whole of that Laminaria tribe. 



THE LAMINAEIA TKIBE 



Comprises three genera : — Alaria — Leaf with a 

 distinct mid-rib. Laminaria — Erond without a 

 mid-rib. Chorda — Erond round, unbranched, hollow. 



ALAEIA ESCTTLENTA. 



(Name from ala, " a wing," in allusion to the winged leaflets at the 

 base of the frond.) 



This beautiful plant is abundant on the northern 

 coasts of England and Scotland, extends throughout 

 the whole of the Northern and Pacific Oceans. It 

 flourishes in the deepest water and on the most ex- 

 posed rocks ; the roughest sea seems to be its chosen 

 playfellow, though the delicate fronds are worn and 



