On the Marine Algæ from North-East Greenland. 115 



a few large and well preserved plants have however been brought 

 home. They seem to be referable to f. grandis Kjellm. and agree 

 with the specimens from East Greenland determined to this form 

 by Jonsson. The stipe is, in larger plants, now rather short, e. gr. 

 30 cm., now long (over 106 cm.). The lamina bears always, in July 

 to September, a remnant of the lamina of the foregoing year at the 

 top, sharply marked against the new lamina by means of a strong 

 narrowing. The new lamina is up to 100 cm. long, up to 50 cm. 

 broad, with very undulated border and with broadly cuneate to 

 rounded base. In older plants the lamina may be provided with a 

 network of lists, in the median part as well as the marginal ones. 

 The lamina has always muciparous canals; in some cases they are 

 rather small, in others they are larger and visible with the naked 

 eye from the face, in particular after staining with methylene-blue. 

 The sorus is distinctly limited, elliptical or oblong. In most of the 

 fertile specimens only remains or traces of a sorus are visible in 

 the old lamina, most often only a hole indicating the outline of the 

 sorus, while a sorus is not yet visible on the new lamina, which 

 seems to show that the sorus is not developed before winter. The 

 hole reached in a larger plant to the very base of the old lamina. 



The hapteræ are always feeble with long thin branches. Some 

 specimens were attached to stipes of the same species. 



Some narrow specimens approach to f. glacialis K. Rosenv. 



(1898 I). 



Loc. Along Koldewey Island; along Cape Bismarck Peninsula; Dan- 

 marks Havn; Baadskæret; bay off Vesterdalen, 2—11 meters. From Hyde 

 Fjord were brought home by Capt. Koch 4 stipes with hapteræ, probably 

 belonging to this species, found on the ice on May 15th 1907. 



26. L. solidungula J. Ag. 



J. Agardh(1868)p. 3; K. Rosenvinge (1893) p. 850, (1898 I) p. 57; Jonsson (1904) p. 28. 



This strongly arctic species is common within the explored 

 area, where it seems to thrive well. The plants had only one con- 

 striction, at the limit between the new lamina and that of the 

 foregoing year, but in most of the plants the latter is not complete, 

 probably because it has been lost during collection or under the 

 preservation. In a few cases only the lamina of the foregoing year 

 was complete and bore further at the top a remnant of the two 

 y^ears old lamina (comp. J. Agardh 1. c. plate I fig. 2). The largest 

 specimen brought home has a total length of 133 cm.; thereof the 

 stipe 39 cm. long, the new lamina 69 cm. long, 40 cm. broad, the 

 lamina of the foregoing year (incomplete) 25 cm. long. The broadest 

 specimen is 45 cm. broad. In some cases a well-developed sorus 

 occurred at the base of the one year old lamina. The named greatest 



