

M. Foslic. Contribution II 



41 



layers and in an extent of several hundred square foot. 

 Lithothamnion in terme d i u m Kjellm. 



N. Ish. AlgfL p. 127. 



f. nana nob. 



f. globosa vel subglobosa, diametro 0.5—1 cm. Tab. 3, fig. 5. 



I met with last summer at Skorpen in Kvænangen a 

 minute form af L. inter medium, growing on lo ose bottom on 

 a depth of 3—5 fathoms jointly with L. norvcgicum. It ap- 

 peared in rather great number, bearing conceptacles of spor- 

 angia which recently were emptied when collected in the be - 

 ginning of September. It may be considered as little inde- 

 pendent, though it deserves perhaps to be specially mentio* 

 ned. Cp. pl. 3, fig. 5. 



Lithothamnion soriferum Kiellm. 



N. Ish. Algfl. p. 117. 



f. divaricata nob. 



f. globoso-elongata, ramis divaricatis, plus minus hamatis. Tab. 3 



fig. 2. 



f. globosa nob. 



f. sphærica vel subsphærica, ramis fastigiatis, fnferne plus minus 

 eoalitis. Fig. Kjellm. 1. c. t. 1 et tab. nostr. 3, fig. 3. 



f. alcicorne Kjellm. (nob.) 



Lithothamnion alcicorne Kjellm. 1. c. p. 121, t. 5, fig. 1—8; tab. 

 nostr. 3, fig. 4. 



Besides L. alcicorne which no doubt is so nearly rela- 



ted to L. soriferum that it cannot be regarded as more than 



a form of the latter, this species appears in two other forms 



which in my opinion ought to be mentioned. The one, the 



above quoted f. globosa, is characterized by its almost glo- 



bose form, erect, rather dense and fastigiate, straight bran- 



ches, issuing in all directions from the centre of the frond 



and more or less anastomosing below. Cp. pl. 3, fig. 3. The 



other, which I have called f. divaricata, has a globose elon 



3* 



