8fe 



CASE pared from Laminaria buccinalis, Ag., (Ecklonia buccioalis, 

 142. jHorne?n.) a native of the Cape of Good Hope. 



Observe Sea Tangle {.Laminaria digitata^lLi). Abundant 

 on our rocky coasts. Surgical instruments made of the hard 

 dry stipes are shown. 



Note sample of Kobi or Konbu {Laminaria saccharina, L.)> 

 from Japan, where it is used as food. It is abundant on our 

 own coasts. 



No. 226. Frond, bearing air bladders, of Macrocystis 

 pyriferay Ag. This is said to be the longest of the seaweeds, 

 a single plant being often 100 feet long. Immense masses are 

 found in every latitude ranging from the Antarctic to the 

 Arctic Circle. 



II. FucACEM, — The plants resemble those included in the 

 PhfsosporecB in colour, but differ in the absence of any asexual 

 mode of reproduction. A diagram showing structure of 

 Fucacem is shown on Gallery (Room No. 9). 



No. 227. Kelp, the ash of the common Sea Wrack 

 {Fucus vesiculosus, L., with other species), burnt in the open 

 air. It was formerly the principal source from whence the 

 soda used in soap and glass-making was obtained. It is still to 

 a limited extent a source of Iodine. 



Note Sulphate of Potash, Chloride of Potassium, 

 and Iodine manufactured from Kelp. 



CASE No. 228. Gulf Weed {Sargassum baccifernm, Ag.). 

 143^ Found in enormous quantities floating in the Atlantic to the 

 west of the Azores, from 20° to 36° north latitude, and again 

 west of the Bahamas. 



Observe the natural perforations in the broad, flat frond of 

 Agarum Tumeric P. and E. 



III. Florideje. — A group of algse known by the bright 

 rose-red or purple colour of the thallus, and by the antherozoids 

 being destitute of cilia. Some of the species become incrusted 

 with carbonate of lime and form rigid, strong masses, popularly 

 called Corallines. 



A diagram illustrating structure in Floridece is shown on 

 Gallery (Room No. 9). 



No. 229. Irish Moss or Carrageen, {Chondrus crispus^ 

 Lyngb.) One of the few marine plants used as food in Europe. 

 It is abundant on our rocky coasts and is collected in the 



