Antarctic and subantarctic Corallinaceae. 



M. FOSLIE. 



With Iwo plates. 



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

 1901 — 1903 brought home rather a large number of calcareous algae. 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 honie 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 

 Lithothamnion, two of vvhich are new, but formerly preliminarily described by me, 

 4 species belong to the genus IJthophyllum, one of vvhich is new and as yet only 

 preliminarily described, i is an Aniplüroa 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 fairh- instructive. But still it 

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

 and subantarctic areas. 



It is, hovvever, 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 hve species of calcareous algae, one of which is uncertain.^' 

 The species found are Litliothamnion coulmauicuin from the Coulman Island near 

 South Victoria Land, Lithotliauinioii a)itarcticui)i (imcertain), Lithothamnion tnagel- 

 lanic2(in, Litlioplivlluni cequabilc, and LitJiophvlluni decipiens. Of these Lithotham- 

 nion coulmanicum has been found only within the eastern part of the antarctic re- 



' Most specinienä coUecIeJ. liowever. were lost by wreck of the vessel. 



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

 graphica! Distribution of Vegetation in the Colder Southern Hemisphere. Ynier 1905 (Slockhiilm). p. 402. 

 Sch'.vtdische Siidpolar- Expedition igoi — igos- ' 



