31 



August, and scantily provided with conceptacles of sporacarps in 

 July and August. 



Occurrence. The species, as understood in the above men- 

 tioned comprehensive sense, is not unlikely dispersed nearly along 

 the whole of the Norwegian coast. It has been found at Kjelmo 

 in Sydvaranger, pretty plentiful but local (f. typica); Bugones, 

 washed ashore (f. intermedia?); Vadso, cast on shore in rather 

 great numbers (f. typica and f. intermedia); Vardo (f. typica, f. 

 glomerata); Havningberg, washed ashore (f. intermedia); Lebesby, 

 apparently rather scarce (f. intermedia); Kistrand, rare (f. glome- 

 rata): Honningsvaag, washed ashore (f. intermedia?); Sopnes in 

 Altenfjord, rare (an uncertain form, perhaps f. flexuosa); Skorpen 

 in Kvsenangen, scattered and rather scarce (f. typica, f. intermedia, 

 f. nana, f. curvi rostra); Karlso (Kjellman), scattered (f. inter- 

 media); Lyngo, rare (f. glomerata); Tromso, abundant but rather 

 local (f. typica, f. intermedia, f. flexuosa, f. corymbiformis) ; Mester- 

 vik in Malangen (an uncertain form, perhaps f. flexuosa); Borgevser 

 in Lofoten, cast on shore (f. typica); Hero in Helgeland (Kr. 

 Schreiner), apparently not uncommon (f. typica and f. inter- 

 media); Beian, abundant but rather local (f. typica and f. fasti- 

 giata); and Moltuen (Vsernes) in the Trondhjem Fjord (Sigvald 

 Schmidt-Nielsen), apparently scarce (f. curvirostra). It probably 

 also occurs along the south-western coast, however, principally but 

 some few and smaller Lithothamnia are known from there. 



Geo gr. Distribution. Iceland (Stromf el t); Greenland (Rosen- 

 vinge)? Britain (Harvey, Johnston, Traill)? The Mediterra- 

 nean Sea (Kiitzing); the Adriatic Sea (Hauck); the Atlantic coast 

 of North America (Farlow, Collins). 



Lithothamnion crassum Phil. 



in Wiegm. Arch. p. 388; Hauck, Meeresalg.'p. 273. 



f. typica Fosl. mscr. 



f. ramis tenuioribus, in parte superiore saepe subcompressis, 

 non vel parce coalitis. 

 Fig. Lithothamnion crassum Hauck 1. c. t. 1, fig. 1, 3. 



f. capitellata Fosl. mscr. 



