SEAWEEDS. 159 



XII., fig. 2), common to all our coasts. The other species 

 of the genus are rare. 



In the same pools, the Chondrus crispus or Carrageen 

 moss {Plate XII, Jig. 3) was growing in great luxuriance, 

 its tough forked fronds of a fine crimson hue bearing 

 iridescent tints under the water, so that I plunged my 

 arm in again and again, hoping to bring out a frond 

 tipped with blue, but the lovely hue disappeared as soon 

 as the weed left the water. Its name of Carrageen moss 

 arises from the fact that its edible properties were first 

 demonstrated at Carrageen, in Ireland. It has lon£ been 

 much esteemed as an article of food in the sister isle ; 

 and when bleached in the sun, stewed down to a jelly, 

 and mixed with wine or cream, and any flavouring, it 

 makes a most nutritious and palatable dish. It is often 

 sold by chemists as a substitute for Iceland moss, and 

 is well worthy the attention of invalids. 



Specimens of the Phyllophora rubens had been given 

 to me by a Scarborough collector, but we found none on 

 the Scotch coast. It is a pretty weed, with a variously- 

 shaped leafy frond, which throws out young fronds from 

 the margin. There are two other species of Phyllophora. 

 The P. membranifolia is not uncommon. 



The Gymnogongrus griffithsea is a native of Devon : 

 its name means naked wart, in allusion to the form of 

 its fructification. The Polyoides Eotundus is also remark- 

 able for bearing large warts on its surface, in which the 

 fruit is contained ; it was sent to me from Jersey. It 

 has a narrow frond, repeatedly forked, and broadest at 

 the tips. 



The Furcellaria fastigiata (Plate XII, fig. 4) grows in 



