liONGL. SV. VKT. AKADEMIENS HANDLlNGAli. BAND. 20. N:0 5. 



339 



PLATE 18. 

 Diploderma amplissimum. Fig.l—8. 



Fig. 1. Part of the base of the frond, seen from the surface. "*%- 



» 2. Transverse section of the same part. ™%. 



» 3. The sterile part of the frond, seen from the surface, ^""/l 



" 4. Transverse section of specimen 90 cm. long, at the middle of the frond, '""/l 



« 3. Transverse section at the middle of the specimen delineated pi. 17 fig. 3. 



» 6. Part of the plant, bearing sporocorps, seen from the surface, ^""/j. 



» 7. Part of the frond bearing sporocarps and antheridia, seen from the surface. ■"*"/]. 



« 8. Transverse section of the same. ^""/i. 



Diploderma miniatum. Fig. 9. 



Fig. 9. Transverse section of the sterile part of the frond. '"'%■ 



Porphyra abyssicola. Fig. 10— 11. 



Fig. 10. Part of the frond with sporocarps in development, ^""/i. 

 » 11. Transverse section of the same. ^""/i. 



PLATE 19. 

 Fucus miclonensis. Fig. 1—2. 



Fig. 1. Specimen from Nordlanden. Vi- 

 » 2. Specimen from Finmarken. Vj. 



Fucus flliformis f. Gmelini. Fig. 3. 



Fig. 3. Specimen bearing receptacles, from Finmarken. Vi- 



PLATE 20. 

 Alaria dolichorliacliis. 



Young specimen of the plant in natural size. 



PLATE 21. 



Alaria dolichorliaoliis. 



Fig. 1. Older specimen. V,. 

 » 2. Sporophyll. Vi- 



