PROPERTIES OF CRYPTOGAMIC PLANTS. 33 



prized as a delicacy. See an interesting article in Merat & De 

 Lens' Diet, de Mat. Med. ii. on the Hirundo esoulenta. 



Fucus dulcis, Gmel. 



Used as f<5od in Ireland and in Siberia. It is maslied uj) 

 and rolled into cakes like tobacco. In the Isle of Skye, they 

 employ the decoction as a sudorific in fevers. Merat & De Lens' 

 Diet, de Mat. Med. iii. 305. This probably does not differ from 

 Iridcea eduUs. 



Fucus tenax, Turner. 



Tliis species is very rich in gelatine. Much used in China 

 for its extraction. Diet, des Sc. Med. xvii. 125. Turner, sur la 

 nouvelle espcce de Fucus, — F. tenax^ Tourn. — qui se dissout en 

 selatine. Merat & De Lens' Diet, de Mat. Med. iii, 308. 



t) 



Fucus tendo, Esp. 



Merat states that of all the fuci this is the one which has 

 most strength, and which most deserves to be em23loyed in mak- 

 ing cordage. Diet, de Mat. Med. iii. 308. 



Fucus amylaceus. Ceylon Moss ; Agar- Agar. 



This has been introduced within a comparatively recent pe- 

 riod into India and England, by M. Previte. It consists, accord- 

 ing to Dr. O'Shaughnessy, of vegetable jelly, starch, ligneous 

 fiber, gum, suIjdIi. and mur. of soda, sulph. and phosp. of lime, 

 wax, and iron ! The decoction is an agreeable, light, and nour- 

 ishing article of food. Dr. Crawford's Hist. Ind. Archipel. iii. 

 46 ; Pereira, Mat. Med. and Tlierap. ii. 38. 



Himantlialia lorea, Lyngb. j Eocky sea-shores — frequent ; 

 F^icus^lATm. I coast of ]Sr. A. (Agar dh, liar v)- 



Yalued in the manufacture of kelp. Grev. Alg. Brit. xix. 



Alaria esculenfa, Gr. Al.Wt. -0.25. \ , " , . -n .l * 

 . 7 , -r. ter and spring : East Am. 



Aqaruin escutentum. Boitv. i , ^ \^ n\ 



-J ^ ^. - ^' ^/^ , I coast as tar south as Cape 



^«cws ^(SCi^/^. Liglitioot, J^l. Scot. I r^ T /TT \ 



^ ' ^Cod. (Harvey.) 



In Scotland, it is known by the name of hladder-loclcs, and is 



eaten both by men and cattle ; the former prefer the midrib, re- 



