THE \l.i. I. OF I OMMONW EALTH BAY— LUl \-. I 3 



examples were preserved which vary greatly in the general outline of the frond, some 



much laciniated, others, as in the fiigure, much less so. Some fronds were sterile, others 



bore cystocarps. The cystocarps and structure of the frond are characteristic oi 



( 'allymenia. 



(Plate 6, figs. 1. -2. 3.) 



Srn.KROCoccACE.E (Dumorl ) Schmidt. 



(ii:.\cii.Ai:iK.K (Naegeli)./. Aijtiiilh. 



Gracilaria * rreville. 



Gracilaria simplex Gepp. 



Evidently abundant on the station. A large uumber of examples were collected 

 some simple, and others showing most of the complex growths depicted by L. Gain, 

 Charcot Expedition, La Flore Algologique, Plate VI. 



Distribution. —South Orkneys. Deception L. [slands Wiencke, Booth-Wandel, 

 Petermann, and oft Cape Wadsworth, Coulmein 1.. Victoria Land. 



(Plate 9. fig. 1.2.) 



Ploatniitim Lamouroux. 



Plocamium coccineum (Hudson) Lyngbye. 



Evidently abundant in the locality. A young plant of Phyllogigas was collected 

 (presumably dredged) with the attachment smothered in Plocamium. Others weir 

 growing with or on Iridcea and Gracilaria, but most of the samples collected weir 

 unattached. 



I failed to see cystocarps. Apparently these are rarely met with in the southern 

 regions. Figures are given (PI. 7, <i. b) of the stichidia. Zonate division was obscure 

 in the tetrasporangia, which were probably not mature. 



All European workers on Antarctic alga' hav< identified the prevailing Plocanum,< 

 as P. coccineum. De Toni, Sylloge IV. pp. 590, 591, apparently would restrict 

 P. coccineum to Atlantic forms. He says, " Specimina collecta in oceano australi ad 

 littora America?, Africse, Tasmaniae, Nova 1 Zealandise-aptius Plocamio leptophyllo 

 videntur adscribenda." He previously describes /'. /rpfop/n/llum Kuetz. as the normal 

 Tasmanian and Australian form. 



The Australasian species, common in Tasmania, and Victorian seas, extends 

 along the New South Wales coast to the north of Sydney. In Southern Queensland 

 and Norfolk Island its place is taken by /'. hant<i/>n>t. 



