ßO Vol. XLIIL, Art. 1.— K. Yendo : 



Compared with other species of Laminar iacea?, the valaable 

 contents, iodine and kah, are comparatively poor in Alaiia. The 

 kelp- burning of Alaria might pay fairly well only in such an ex- 

 traordinary time as during this great war, when the market price 

 of kalium chloride has become more than ten times as high as in 

 ordinary days. The value of Alaria as a resource of kelp is much 

 discounted by the fact that wherever Alaria plants grow, there are 

 also found other Laminariaceous members which are richer in 

 iodine and kali. 



In short, Alaria plants have very little value as human food 

 or for kelp- ash. For manure they may be used equally well as 

 other brown seaweeds, such as Sargassiim, Fucus, etc. 



Distribution and Habitat. 



All species of Alaria are inhabitants of the northern colder 

 seas. The greatest number of species are found within a range 

 fi'om about 42° N up to the arctic circle. On the Pacific coasts, 

 its southern limit is at Kinkwasan Island (38°17'N) on the west 

 side {A. crassifolia) and about the middle part of California (37° N) 

 on the east {A. marginata). On the west side of the Atlantic, no 

 record of Alaria is known south of Cape Cod (about 41- 30' N) 

 where A. Pylaii Geev, occurs ; and on the east, A. esculenta Geev. 

 finds its southern limit on the coast of France (about 45° N). In 

 the Baltic Sea, Alaria is entirely wanting within tlie Kattegat. 



In Japan, Alaria is foiuid on the Pacific as well as on the 

 Ochotsk coast. No species occurs in the Japan fSea. It may in- 

 trude into the Sea a short distance only through the two entrances, 

 the Tsugaru Strait from the Pacific Ocean, and the Soya Strait 

 from the Ochotsk Sea. 



