26 M. FOSLIE. [1905 



(Batters!); Ireland: Larne, Co. Antrim (Hanna!), Dalkey Sound 

 near Dublin (Johnson!,!); France: Finistere (Debray!) 1 ); Pacific 

 coast of North America (f. pacifica): Channel Rocks, Wash. (Set- 

 chell and Gardner!); Pacific Grove, Cal. (S etch ell!). 



c. Raraosa. 

 6. Lithothamnion glaciate Kjellm. 



N. Ish. Algfl. (1883), p. 123, t. 2—3! 



f. typica. 



The basal crust usually vigorous, sometimes disappearing 

 (being attacked by animals), sending forth coarse lobes ; branches 

 subsimple or irregularly divided, frequently with wartlike processes 

 or short side-branches and often forming irregular bundles. 



f. botrytoides Fosl. mscr. 



Lithothamnion botrytoides Fosl. in Rosenv. Deux. Mem. Alg. Mar. Gronl. (1898), 

 p. 10; Rev. Syst Surv. Melob. (1900), p. 11; De Toni, Syll. Alg. IV (1905), p. 

 1733; Lithothamnion intermedium Rosenv. Gronl. Havalg. (1893), p. 774! Litho- 

 thamnion delapsum f. conglutinata Fosl. Norw. Lithoth. (1895), p. 50, t. 14, fig. 4. 



The basal crust vigorous, sending forth lobes with very short, 

 .approximate branches, forming small bundles more or less distant. 



f. subfastigiata Fosl. mscr. 



Lithothamnion glaciale f. verrucosa Fosl. Rev. Syst. Surv. Melob. (1900), p. 11. 



!) A bleached specimen from that place (D e b r a y, no. 67) seems to me to 

 belong to L. Sonderi, although on the other hand it much approaches 

 L. Lenormandi. The frond, however, is coarser than in the latter, and 

 the cystocarpic conceptacles are more acute, or almost conical. On the 

 contrary, the conceptacles of sporangia are smaller than frequently in 

 typical L. Sonderi, 300 — 350 /->■ in diameter. In this respect as well as in 

 habit the specimen apparently stands nearest to f. sublcevigata. 



Three other specimens bleached and rather stunted from the same place, 

 which I formerly with some doubt referred to L. Sonderi, are too uncertain 

 to be recorded under this species. The}'' are likely to belong to another 

 species. 



Some years ago I referred to L. Sonderi a few bleached specimens 

 from Guethary (Basses Pyrenees), collected by C. S a u v a g e a u (no. 6). 

 The}'' partly share substratum with Liihoph. subtenellum. After a renewed 

 examination of these specimens I now consider them to represent a rather 

 coarse form of Lithoth. Lenormandi. I found some cystocarpic concep- 

 tacles, which are too low to be identic with those in L. Sonderi. 



