Antarctic and subantarctic Corallinaceae. 



liy 



M. FOSLIE. 



With two plates. 



The Swedish Expedition in the "Antarctic" to the colder Southern Hemisphere 

 1901 — 1903 brought home rather a large number of calcareous alga;. They had 

 been collected by Dr. Carl Skottsberg, the botanist of the expedition, who has 

 kindly left me the collection to be determined." The greater number were taken at 

 the Observatory Island near the Staten Island, a few in the Beagle Channel, Fuegia; 

 besides several specimens have been brought home from the Falkland Islands, some 

 from South Georgia, and a single one from Louis Philip Land. 



The collection represents 13 species. Of these species 7 belong to the genus 

 Lithot h amnion, two of which are new, but formerly preliminarily described by me, 

 4 species belong to the genus Lithopliyllum. one of which is new and as yet only 

 preliminarily described, i is an Amphiroa and i is a Corallina. 



The total of calcareous alga-, collected by different expeditions of late years to 

 the colder Southern Hemisphere, provides a material fairly instructive. But still it 

 is not large enough to afford a particular survey of their occurrence within antarctic 

 and subantarctic areas. 



It is, however, an ascertained fact that the said algae are fairly much dispersed 

 even within the true antarctic region, and that, at any rate in some localities, they 

 also occur in considerable numbers of individuals. Within the said region there 

 have hitherto been found five species of calcareous algœ, one of which is uncertain.^ 

 The species found are Lithothavinion coulmaniciiin from the Coulman Island near 

 South Victoria Land, Ltthotltanniion aiitarcticiun (uncertain), Litliothanuiioii magel- 

 lanicum, Lithophyllnni œquabile, and Lithophyllwn decipiois. Of these Liihotham- 

 niott coulmanictan has been found only within the eastern part of the antarctic re- 



' Most specimens collected, however, were lost by wreck of the vessel. 



° As to circumscription of the antarctic region cp. Carl Skottsberg, Some Remarks upon the Geo- 

 graphical Distrilnition of Vegetation in the Colder Southern Hemisphere. Ymer 1905 (Stockholm), p. 40z. 

 Schivedische Siiiipolar- Expedition igoi — içoj. i 



