PLATE XI. 
Laminaria coriacea n. sp. 
Fig. 1. Habit of two plants from Kiritappu, Prov. Kushiro. x 0.1. 
Fig. 2. Basal part of a frond, x 0.4. 
Fig. 3. Cross section through the lower part of the stipe, x 1.6. 
Fig. 4. Cross section of the blade. x 0.4. 
