PLATE XXIX 
Laminaria japonica Arescii. 
Fig. 1. Part of a cross section through the median fascia of a blade, x 90. 
a. epidermis; b. outer cortex; c. inner cortex; d. medulla; e. corss sections of 
mucilage canals, two of which are partly or entirely surrounded by small 
mucilage-secreting cells; f. cross section through a trumpet-shaped cell; g. 
cross sections through filamentous cells. 
Laminaria angustata Kjellm. 
Fig. 2. Cross section through the medullary tissue of a frond, showing 
entangled filamentous cells and two trumpet-shaped cells, x 90. 
Fig. 5. Surface view of a part of a blade showing the net-works of 
mucilage canals stained with anilin blue; the net-works on the right side of 
the figure are situated in the median fascia area of the blade and those on the 
left side in the marginal area, x 9.7. 
Fig. 7. Showing four zoosporangia (a) and four paraphyses (b). x 300. 
Laminaria longissima Miyabe 
Fig. 3. Surface view of a part of the median fascia of a blade showing the 
net-work of the mucilage canals stained with anilin blue; the portions stained 
in deep blue are occupied by the secreting cells, x 9.7. 
Fig. 4. Surface view of a part of the marginal portion of a blade, 
showing the same structure as in Fig. 3. x 9.7. 
Laminaria cichorioides Miyabe 
Fig. 6. Part of a cross section through a blade, showing three mucilage 
canals, of which two are provided with an outwardly developed branch canal 
reaching the inner wall of the epidermis, x 67.5. 
Chorda Filum (L.) Lamour. 
Fig. 8. Zoospores (after Reinke). x 900. 
