10 AUSTRALASIAN ANTARCTIC EXPEDITION. 



Desmarestiace^ (Thuret) Kjellman. 



Desmarestia Lamouroux. 



Desmarestia compressa (Reinsch) Skottsberg=D. Harveyana Gepp. 



Various fragments and one handsome specimen nearly 6 feet long. 



Fully figured by A. and E. S. Gepp, with detailed structure, National Anctarctic 

 Expedition, " Discovery," Natural History, vol. iii, Skottsberg, " Antarctica " 

 Pheeophyceen, gives a photograph of an entire plant showing the attachment. 



Distribution. — South Georgia, South Shetlands (Deception, King George); 

 Cockburn I, Gerlache Sts., Booth-Wandel, Petermann and Argentine Islands; 

 Kerguelen; Cape Adare and Coulmein Is., Victoria Land. Commonwealth Bay is 

 again an intermediate station. 



The species is sublittoral in its habitat. Thus L. Gain, Second French Expedition, 

 " Pourquoi Pas? " La Flore Algologique, p. 38, writes, " Le D. compressa est tres 

 commun dans toute la region ouest de la terre Louis-Philippe et de la terre de Graham, 

 ou il forme une zone characteristique assez loin au dessous du niveau des basses mers. ' 

 And Skottsberg, I.e. p. 19, " Auf Fels-und Stein-grund der sublitorales Region bis zu 

 ihrer untersten Grenze (etwa 40 m.), ausnahmsweise kleine Exemplare in Tiimpeln des 

 Gezeitensgebiets." 



Ectocarpace^e (Agardh) Kuetzing. 



Geminocarpus Skottsberg. 



Geminocarpus geminatus (Hooker fil. and Harvey) Skottsberg. 



Plants were found growing attached to Plocamium coccineum. Typical form 

 showing plurilocular sporangia. 



Distribution. —Southern South America (Hooker, Hariot, Skottsberg), Falkland 

 I. (Hooker, Skottsberg), South Georgia (Skottsberg), Booth-Wandel (Turquet), 

 Petermann I. (L. Gain), Kerguelen, Cape Adare, Victoria Land. It also occurred in 

 the material collected by the Mawson Expedition at Macquarie Island. 



FLORIDE.E Lamouroux. 



GiGARTiNACEiE Schmitz. Gigartine^: J. Agardh. 



iRiDiEA Bory. 

 Iridcea cordata (Turner) J. Ag. 

 Dr. L. Gain," La Flore Algologique des Regions Antarctiques et Subantarctiques," 

 pp. 55-57, demonstrates the identity of the southern /. micans Bory with the northern 

 I. cordata Turner, and justifies the inclusion in /. cordata of the forms described as 



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