28 



of rugae and a little thicker than the undulate marginal part. 

 The stipe is relatively thin and 60 — 130 cm. long. 



The narrower specimens with lanceolate lamina remind 

 partly of L. saccharina var. glacialis Kr. Rosenv. (Deux. Mém. 

 p. 53), partly of the main form of д. grandis Kjellm., while 

 the broader plants with ovate lamina of all described forms of 

 Laminaria saccharina mostly resemble o. grandis f. latifolia 

 Kjellm. (Handb. p. 26, Laminaria saccharina f. latissima Kjellm. 

 Arct. Alg. p. 230), and only seem to differ from the latter in 

 this, that the lamina does not attain so large a breadth, and 

 consequently also in this, that the base does not appear so 

 markedly cordate. 



The specimens were gathered changing the lamina and with 

 sorus in July, in a depth of 3 — 8 fathoms, both in sheltered 

 localities, in rapid current, and on open shore. 



Gr. or.: Turner Sund, Кар Borlase Warren, Sabine Ö. 



48. L. solidungula J. Ag., K. Rosenv. Grl. Havalg. p. 850, 

 Deux. Mém. p. 57. 



The species is considerably varying in size and in the 

 form of the lamina. The shorter specimens are 6,5 cm. long 

 and sterile; they are evidently very young plants, 1 — 2 years 

 old. The larger specimens are 250 cm. long, evidently peren- 

 nial plants. Many of the specimens have a lamina divided in 

 four parts (one in 5), dating from different years. In the oldest, 

 and often in two of the oldest portions an opening is found of 

 the same shape as the sorus, and in its place in the lamina; in 

 the one year old portion of the lamina, and often also in the oldest 

 portion but one, the place where the sorus was found is clearly 

 marked from the other portion by its whitish colour and its greater 

 transparency. The sorus is generally ovate, or oblong-ovate, 

 or oval-elliptical in the basal part of the lamina as described 

 by J. Agardh (Spetsb. Alg. p. 3) and Kjellman (Spetsb. II, 

 p. 16); but in two cases I have met with a different form of 



