68 Vol. XLIIL, Art. 1.— K. Yenrlo: 



low water level, the depth varying according to the tidal range of 

 the locality. 



Up in the north, the germinating season is undoubtedly later 

 than in the south. The influence of the sun's heat upon the algae 

 at low tide is not sufficiently intense to harm them. Here the 

 plants may bo found still flourishing, but not so well as in deeper 

 water, jnst above the water level during the lowest spring tides. 

 On the west coast of Vancouver Island, where the tidal range 

 is as great as 25 feet at spring tides, the Alaria plants, as well 

 as other Laminariaceous members, are exposed to the air at ebb- 

 tide hours. This region is well known for the rich moisture in 

 the air during summer, so that mist and fog prevail for several 

 hours almost every day. The luxuriant growth of Alaria, which 

 is properly a sublittoral inhabitant, between the tidal marks in 

 this region is very likely duo to this climatic circumstance. In 

 the southern parts of Kamtschatka and in the North Kuriles, 

 parallel examples might be met with. 



BöiiGESEN observes at the Faeröese Islands that A. escnicnta is 

 found as high as several feet above the lowest water mark at 

 several places, as the dashing waves can irrigate the place. This 

 is also the case with other places in the world and with some 

 other species of algae. It is one of the ecological characters 

 common to those algae which are inhabitants of the lowest littoral 

 region and adapted to confront the surfs. 



It is well known to the field algologists that Alaria plants are 

 rarely found in quiet bays or in tide pools. An observation on 

 the tide pool flora made by Miss Skin nek i) on the west coast of 

 Vancouver Island is highly suggestive and may contribute a posi- 

 tive record for this fact. She studied eight tide pools of various 



1) Skinneb : Observ. on the Tide-pool Veget. of Port Eenfrew, p. 153. 



