29 



sorus. In one case the soriis 

 occupied the middle of the 

 upper part of the young 

 lamina, and only the lower 

 third of the lamina was 

 sterile; the sorus was how- 

 ever not continuous in its 

 whole length ; it was about 

 50 cm. long, its greater 

 breadth 5 cm. ; its smaller 

 breadth 2 cm. In the other 

 case the one year old la- 

 mina, 70 cm. long, had a 

 linear sorus 65 cm. long 

 and 6 cm. broad; it was 

 almost equally broad in its 

 whole length, only narrow- 

 ing off a little upwards. 

 A similar form of sorus 

 seems to be mentioned by 

 Kjeilman (Spetsb. 11, 

 p. 1 7 ) and by Rosenvinge 

 (Deux. Mém. I.e.). The form 

 of the lamina^) varies as 

 mentioned by Kjellman 

 (Spetsb. II, p. 16) from the 

 almost circular to the 

 lanceolate form. In young 

 specimens we frequently 

 meet with a Ungulate apex 

 in the young lamina, some- 



') By lamina is meant here the 

 portion of the lamina devel- 

 oped in a single year. 



Fig. 2. Laminaria solidungula J. Ag. 

 Two dried specimens photographed by 

 E. Warming, showing the lamina divided 

 in four parts, dating from different years. 

 In the three years old portion an opening 

 indicates the place of sorus. 



