338 
Fig. 7. 
Tig. S. 
Pig. 
lig. 
Fig. 
ig. 6. 
KJELLMAN, THE ALGA OF THE ARCTIC SEA. 
Ceramium rubrum f. squarrosa. fg. 7. 
Part of specimen bearing tetrasporangia. 1/,. 
Rhodochorton intermedium. fg. 8. 
Part of full-grown specimen. 1/,. 
Rhodochorton Rothii f. globosa. Fig. 9—173. 
Specimen, seen from the surface. °/,. 
Part of the basal layer of the frond. 39/,. 
Branch-system issuing from the basal layer. */). 
Lower part of the main axis of such a branch-system. 3°/,. 
Upper part of a branch of the last order but one. %?/,. 
PLATE 16. 
Antithamnion Pylaisei f. norvegica. Mig. /. 
Upper part of a full-grown specimen. 8°/,. 
Antithamnion boreale f. typica. Ig. 2—3. 
Lower part of a branch-system of the first order. %°/,. 
Top of another. %/,. 
Antithamnion boreale f. corallina. lig. 4—5. 
Lower part of a branch-system of the first order. 5%/). 
Top of a feeble branch-system of the first order. %°/,. 
Rhodochorton mesocarpum f. penicilliformis. /g. 
Part of specimen bearing tetrasporangia. °/,. 
Part of branch with tetrasporangia. %9/,. 
PLATE 17. 
Diploderma amplissimum. fg. 1—3. 
1—35. The plant at different ages. '/j. 
4. 
Porphyra abyssicola. fg. 4. 
Full-grown specimen. !/). 
6— 7. 
