60 



pink, most often with a purplish tinge, in winter, however, a brow- 

 nish pink, but nearly always getting much lighter when dry. The 

 frond is branched in a rather irregular, or sometimes nearly sub- 

 dichotomous manner. The branches frequently issue in all directions 

 from the centre of the frond, always with short axes, in the lower 

 part more or less bent, in the upper part often rather straight, 

 frequently forming more or less remoted bundles, which are com- 

 posed of short branches bearing more or less numerous and wart- 

 like processes or short branchlets. They are terete or nearly terete, 

 1 — 1.3 mm. thick, sometimes of nearly the same thickness throug- 

 hout, sometimes a little thicker below, here and there somewhat 

 anastomosing, buth never much, often with slightly thickened and 

 frequently nearly obtuse ends. PI. 15, fig. 20 — 27. The frond 

 occasionally may be rather compressed, in part corresponding with 

 the form alcicornis of L. tophiforme and f. flabelligera of L, 

 coralloides, but the specimens that I have seen of this form are 

 not so distinctly marked as to make it possible to draw any de- 

 finite limit, and I, therefore, at present do not record it at deno- 

 minated form of the species. 



As to the structure the species coincides with L. coralloides. 

 In a longitudinal section of a branch the inner cells of the cup- 

 shaped layers of tissue are about 7 — 9 p. long and 4 — 6 jx thick. 



I have examined numerons summer- as well as winter spe- 

 cimens, but only one or two met with bearing organs of propa- 

 gation. The conceptacles of sporangia frequently appear to be rather 

 crowded below the tip or in the upper part of the branches. They 

 are convex, but very little prominent, distinctly marked, seen from 

 the surface 350 — 400 p. in diameter, sometimes, however, only 

 300 p. The roof is traversed by 60 — 70 muciferous canals. The 

 sporangia that I have seen were not fully developed, sometimes 

 without any partition sometimes two-parted with an apparently 

 well developed wall. However, in some of the latter I found in 

 one or both cells partly a just founded partly a more developed 

 transverse wall issuing from the one side, and once I found one 

 of the two cells parted into two by an entire but rather indistinct 

 wall. Therefore, mature sporangia no doubt are tetrasporic. They 



