MARINE ALGJE OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 77 



Dr C. Skottsberg (loc. cit.) criticised our separation of the two species; and in 

 founding his new genus Phyl/oyigas he reunited them in its single species. His criti- 

 cism provokes a wish to reinvestigate the Scotia material. Unfortunately, that 

 material lias long since passed out of our hands and indeed out of our memory. And 

 at the time of writing this note we are far removed from access to slides, microscope, 

 herbarium, books. But from what we can remember of the specimens, and from what 

 we have written about them, we feel that Dr Skottsberg has failed to appreciate the 

 structural differences which in our opinion separate the species. L. simulans may well 

 be a species of PhyUogigas ; and we have now placed it therein as a second species, 

 that is, distinct from P. grandtfolia. 



In treating of P. grandifoUa, Dr Skottsberg based his detailed description and his 

 figures of the anatomy upon his own material gathered in South Georgia and Graham 

 Land. But, as far as we can understand them, they appear to us to approach much 

 more nearly to the structure of the type of P. simulans from the South Orkneys than 

 to that of P. grandifoUa from Cape Ad are in Victoria Land a conclusion which would 

 be in agreement with the widely separated distribution of the two species in the 

 Antarctic region. It should be added that Dr Skottsberg, when writing his paper, had 

 not seen our fuller account and figures of these types published in the Report of the 

 National Antarctic Expedition. For though our paper was already in type a month 

 or two before we had the pleasure of making Dr Skottsberg's acquaintance, yet it was 

 not actually published until a few weeks after his paper appeared. 



14. ADENOCYSTIS LESSONII, Hook, and Harv. MacDougall Bay, South Orkneys, 

 November 1903. 



Geographical Distribution. Cape Horn, Falklands, Auckland and Campbell 

 Islands, Cockburn Island, Wandcl Island, Kerguelen, Tasmania, and New Zealand. 



1 5. DESMARESTIA Rossn, Hook, and Harv. Scotia Bay, South Orkneys, 1-3 fathoms, 

 March 1, 1903. 



Geographical Distribution. Cape Horn, Falklands. 



It is surprising that the Scotia collections contain no example of the plant 

 called D. media in the Flora Antarctica, part ii. (1847), p. 466. It is a common 

 species in the south polar region, and well represented in the Discovery collections ; but 

 it is not as Harvey supposed identical with the northern D. media, Grev. (Sporochnus 

 medius, C. Ag. ). We have been compelled to rename the southern species D. Harveyana. 

 Our reasons for this have been given in the Report of the National Antarctic Ex/><'- 

 /, iii. p. 7. 



FLORIDE^E. 



1G. WILDEMANIA LACINIATA, De Toni ( Porplnjra laciniata, Ag.). Buchan Bay, 

 South Orkneys, March 25, 1903; Scotia Bay, South Orkneys. 



Geoij rap!i ical Distribution. -Mediterranean, North Atlantic, South Georgia. 



