M. FOSLIE. [1899 



fortunately the material at my disposal is too scanty to elucidate 

 the significance of this connection. 



A longitudinal section of a branch shows regular cup-shaped 

 layers of tissue. In the upper part the cells are 14 — 24 /-/ long 

 and 8 — 14 jj^ broad, the cell-rooms often vvith somewhat rounded 

 corners and rather thick walls. 



The species stands very near to L. hracliycladuni especially 

 in habit, but is separated as regards the conceptacles, and parti- 

 cularty in structure. 



It has been coUected on the coast of Sao Sebastiao, Brazil, 

 and kindly communicated to me by the Director do Museo Pauli- 

 sta, Dr. H. von Ihering, No. 1047 and 1048. 



In Thuret^s (Bornet's) herbarium are two specimens from Flo- 

 rida, coUected by Wærdemann, one of which rather approaches the 

 above f. heter omorpha, though still coarser and less branched, the 

 short and in part undivided branches 4 — 5 mm. or more in dia- 

 meter. It is steril but shows overgrown conceptacles of sporangia 

 of about the same size as those in the present species. The struc- 

 ture also stands near to that in the latter, the cells, however, fre- 

 quently being a little smaller. It perhaps represents a separate 

 species, although the present one probably is much varying. 



Lithothamnion japonicum Fosl. mscr. 



The solitary specimen of this species that I have seen has 

 the shape of a small bush, 3,5 by 2 — 2.5 cm. in diameter, and has 

 been attached to the hold fast of a Laminaria. It is subdichoto- 

 mously branched, with short, cylindrical, rather bent and some- 

 what spreading branches, almost uniform in thickness, 2 — 3 mm., 

 here and there knottj^, with rounded ends. The specimen is much 

 burdened with Squamariaceae, other algae as vvell as divers extra- 

 neous objects. New formations occasionally are developed so as 

 to cover these objects, and sometimes even looking as small inde- 

 pendent crusts on the branches, or stretched between the lower 

 part of two branches. 



The conceptacles of sporangia are somewhat crowded in the 

 upper part of the branches, convex but very little prominent,' 



