10 M. FOSLIE, (Schwed. Südpolar-E\p. 



Lithophyllum Phil. (Fosl. emend.). 

 I. Lithophyllum decipiens F"osl. 



Cale. Alg. Fiiegia (igoo), p. 71; Lithothaninion decipiens Fosl. On some Lithoth 

 (1897), p. 20. 



f. subantarctica FoSL. 



Alg. Not. II (1906), p. 18; cfr. tab. nostr. i, fig. 11, tab. 2, fig. i — 2. 



It is hardly to be settled whether L. decipiens and Litliopli. Yendoi, occurring 

 in the Malayan i\rchipelago, on the coasts of Japan etc., are belonging to one and 

 the same species or independent. Even more difficult it is at present to draw a line 

 between the different forms of L. decipietis, such as this species occurs on the coast 

 of California, in the West-Indies, and particularly in the western part of the sub- 

 antarctic region. In Alg. Not. 1. c. I have proposed to denominate the Californian 

 form f. tvpica and the \\'e.st-Indian form f. carilnca. It is possible that these forms 

 will have to be classified as species independent. But I do not at present venture 

 to do so, as the material, particular!}- that from California, is too inconsiderable. ' 



In the subantarctic region the species seems to be of about the same frequenc\- 

 as L. discoideiim, though it has not }et been met with at the Falkland Islands, and 

 does not occur so far to the south as the species mentioned. It is almost always 

 more or less overgrown by L. discoideiim, which is more vigorously developed. 

 Like L. discoideum, it occurs partly in the litoral region, partly in the subjitoral 

 one, and descends to a depth of about 14 fathoms. The southern limit as yet know n 

 of the form is the Soutli Orkneys, where, however, on!}- specimens feebly developed 

 have been found. 



Area: (f. subantarctica): Fuegia: Near the mouth of Rio Grande (DuSËN); 

 Observatory Island near Staten Island (Skottsberg); South Orkneys: Scotia Bay 

 (Scottish antarct. Exp.). 



2. Lithophyllum discoideum Fosl. 



Gale. Alg. Fuegia (1900), p. 73. 

 f. circumscripta FOSL. 



Alg. Not. II (1906), p. 22; tab. nostr. 2, fig. i. 

 f. typica. 



Fosl. Alg. Not. .II (1906), p. 22; Lithophyllum fuegianum Heydr. Lithoth. Mus. Paris 

 (1901), p. 535, Taf. XI, Fig. 1!; tab. nostr. 2, fig. 2 — 4; cfr. tab. i, fig. 10. 



' Also Lithophyllum pin^tiiense Heydk. (in Lithoth. .Mus. I'aris 1901, p. 535I I referred (Melob. Arli. 

 Heydr. p. 25) to L. decipiens. I can still draw no certain line between them, but on a later occasion I will 

 treat more particularly of the mutual relations of the said forms. 



