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O 



58 



Tromsø Museums Aarsheftir. 14. 1891, 



Plate 3. 

 Lithothamnion colliculosum. 



Fig, 1. Habit-figure of 8 specimens of the plant indifferent 



stages of development. 



Lithothamnion soriferum f. divaricata. 

 « 2. Habit-figure of 6 specimens of the plant. 



Lithothamnion soriferum f. globosa. 

 « 3. Habit-figure of 4 specimens of the plant. 



■ 



Lithothamnion soriferum f. alcicome. 



« 4. Habit-figure of 2 typical specimens of the plant and 



(2) transitions to f. divaricata, 



Lithothamnion intermedium f. nana. ' t 

 v « 5. Habit-figure of 16 specimens of the plant. 



Lithophyllum Lenormandi f. læve. 

 « 6. Habit-figure of the plant (4) growing on muscles. 



- 



Lithothamnion norvegicum f. globulata. 

 « 7. Habit-figure of 16 specimens of the plant. 



* 



Lithothamnion circumscriptum. 



« 8. Habit-figure of the plant (5) growing on a stone 



and on muscles. 



