Fig. 1. 
» 2 
Nie Cae 
» 4, 
artes 
ye 
» hike 
» 12. 
» 13. 
» 14. 
lay 
» 16. 
» 18. 
» 19, 
ag. A. 
» 2: 
Fig. 1. 
Dees 
KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 20. No 5. 
Explanation of the figures. 
PLATE 1. 
Lithothamnion soriferum. 
Yr <u 1 
Young specimen. '),. 
Somewhat older specimen, seen from above. 1)). 
The same specimen, seen from below. 1). 
ees : 1/ 
Full-grown specimen. 1/;. 
Half of a younger specimen, seen from the cleaving-surface. '/,. 
10. Branch-systems of different development. 1/,. 
Branch with conceptacles of sporangia. ?/). 
Part of transversal thin section!) of a branch. 7°), 
Part of median thin section of a branch. 4°). 
Part of one of the outer concentric layers of a transversal thin section. 4°/,. 
Part of the central layer of a transversal thin section. 7°°/). 
Part of a superficial tangential thin section. 7°°/). 
Part of the roof of a conceptacle of sporangia, delivered from lime. 4°°),. 
een 300 
Sporangium. Rie 
PLATE 2. 
Lithothamnion glaciale. 
Older, full-grown specimen, seen from above. '/j. 
The same, seen from below. 1/j. 
PLATE. 3. 
Lithothamnion glaciale. 
Young specimen, surrounding part of a stone, 1). 
Somewhat older specimen, completely inclosing a stone. 1). 
') Thin section = slice made thin by grinding. 
rc 
—“ 
w 
