M. Foslie. Contribution II. 



53 



I 



give here a short description of sorae of the forms 



from Svinor bearing propagula or gemmæ. 



127. On the leaf of L. digitaia. The disk-like basal 

 part sends out by some specimens a few short, free radic- 

 les. The upright filaments 55—60 ^ thick below, nearly 

 uniform in thickness throughout, or sometimes slightly thick - 

 er in the middle, with the segments % to 1 J / 4 time lon- 

 ger than broad, seen from the side divided into 3—4 cells 

 equal in hight, bearing rather few branches which are gene- 

 rally a little thinner than their main axis, subsecund, alter- 

 nate or in the upper part now and then opposite and more 

 or less patent, decreasing in length upwards, mostly tape- 

 ring towards the apex and provided • with some other braneh 

 of the second order. Chromatophores ovale or rounded, nu- 

 merous. I have not seen propagula in this form but some 

 few gemmæ (Brutzellen) about 40 [x in diameter. 



121. On the stem of L. intermedia. The basal disk 

 issues some other long, free, undivided radicle. Upright fi- 

 laments 35—60 \x thick, sometimes increasing in thickness 

 upwards, sometimes thickest in the middle, segments 1— -2 

 times longer than broad, seen from the side divided into 3 

 5 cells equal in hight, with subsecund or alternating, most- 

 ly elongated branches which are thinner than their main axis, 

 attenuating, simple, or bearing some few branches of the se- 

 cond order. Propagula few, subcylindrical, 200—270 [J-long, 

 25—35 [j. thick, with 3 subcylindrical rays 150— 400 \i long. 



11. On the leaf of L. saccharina. The upright fila- 

 ments 35—50 [J. thick below, 30 — 45 \k ab o ve, bearing rather 

 numerous subsecund, alternate or sometimes opposite bran- 

 ches, provided with some other braneh of the second order. 

 Propagula pretty common, subcylindrical, 130—220 [x long, 

 20—25 \l thick, with 3 rays 250—400 |x long. In other 

 specimens growing on the some host piant and on Cramium 



ruhrum the propagula are also provided with a short hair, 



J * . 



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