KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 229 
mucifere in the lamina, which are wanting in ZL. Agardhii. It can hardly be confounded 
with L. saccharina, being quite different in appearance. 
It is impossible at present to disentangle its synonymy. But I believe that that LZ. 
saccharina and L. caperata which is reported from Baffin Bay may be supposed to belong 
to the present species and not to L. saccharina as it must be now restricted. On the 
contrary, the L. cuneifolia reported from the White Sea appears to be referable rather 
to L. Agardhi than to the species named L. cuneifolia by J. G. AGanpu'), and the 
L. saccharina recorded from the American Arctic Sea may apparently be regarded as 
L. longicruris. 
Habitat. The present species grew on the north coast of Siberia in exposed lo- 
calities within the sublitoral zone in 2—5 fathoms water on stony and gravelly bottom. 
It was gregarious here. All specimens taken from the end of April to the beginning 
of July were in course of changing their lamina. The development of the new lamina 
appears to commence at the beginning of April. On the remaining part of the old 
lamina in some individuals collected at the end of April there was found a sorus with 
sporangia containing zoospores. Specimens from Greenland probably collected in August 
are richly provided with zoosporangia. 
Geogr. Distrib. In the Arctic Sea this alga is known from Baflin Bay and the 
eastern part of the Siberian Sea. Goxr states it to occur also in the White Sea. Its 
most northern known locality is Jakobshavn on the west coast of Greenland Lat. N. 69° 15’. 
Localities: The White Sea(?). Cp. Gonr, Algenfl. Weiss. Meer and above. 
The Siberian Sea: Irkaypi, Koljutshin Isle, Pitlekay, and the coast eastward of 
this point, common and abundant. 
Bafjin Bay: Cumberland Sound (?), the west coast of Greenland at Jakobshavn. 
If the alga named L. saccharina by Croari, Dickin, and Asumeap should belong to 
the present species, it is probably common and plentiful along the whole western coast 
of Greenland up into Smith Sound. 
Laminaria saccharina (L.) Lamour. 
Ess. p. 42. Fucus saccharinus L. Spec. Plant, 2, p. 1161. 
f. linearis J. G. Aa. 
Lam. p. 12. 
Deser. Waminaria saccharina a linearis J. G. AG. 1. e. 
» » » f. prima J. G. Ac. Spec. Alg. 1, p. 132. 
f. oblonga J. G. Aa. 
Lam. p. 12. 
Descr. Laminaria saccharina 6 oblonga J. G. AG. 1. e. 
') Gost has kindly sent me for examination a fragmentary specimen of that plant from the White Sea which 
he has called ZL. cuneifolia. This appears to me referable to L. Agardhii, although it is extremely difficult 
to decide the question definitely. However, I have tried in vain to find any lacune in the lamina. 
