VII. SOME SOUTH ORKNEY ALG^E. 1 



By E. M. HOLMES, F.L.S. 



THE following list 2 comprises the calcareous algte submitted to me for identification by 

 Mr R. N. Rudmose Brown, and, in addition, some fragmentary algfe found adhering 

 to these. The specimens were all collected at the South Orkneys during the stay of 

 the Scottish National Antarctic Expedition there from March to November 1903 : 



PRASIOLA CRISPA, Ag. s tip. Alg., p. 146 ; Kiftz. Tab. Phyc., v. tab. 40, f. vi. ; De Toni, 

 fti/U. Alg., i. p. 142. Saddle Island, Scotia Bay, Ferrier Peninsula, etc. 



Very common on rocks up to several hundred feet, wherever there is running 

 water in spring. 



Distribution. The species is cosmopolitan in distribution, including Graham Land 

 and Cockburu Island, Antarctica. 



SCYTOTHAMNUS RUGULOSUS, De Toni, Syll. Alg., iii. p. 454. Scotia Bay, 9-10 

 fathoms, April 1903. 



Distribution. Also recorded from the Magellan Straits and Falkland Islands. 



CRYPTONEMIA LUXURIANS, J. Ag. Sp. Alg., ii. p. 228. Scotia Bay, 9-10 fathoms, 

 April 1903. 



The undulate margin and parchment-like consistence of this fragmentary specimen 

 indicate that it belongs to the above species. It is recorded from south polar regions 

 1 >y J. G. Agardh from Montague's specimens collected in the Voyage au Pole Sud ; 

 but Hariot failed to trace it in Montague's herbarium, and found only Delesseria 

 Lyallii, Harv. It is therefore interesting to ascertain that the plant really does occur 

 in the Antarctic Ocean. 



Distribution. Canary Islands, Cape Verde Islands, Brazil, and Martinique. 



IRIDEA, sp. Scotia Bay. Minute cuneate fronds of about 1 cm. long occur on the 

 stones received, in company with the Lithothamnia, but it is impossible to determine 

 to which of the species known to occur in the Antarctic Ocean this plant belongs. 



PLOCAMIUM SECUNDATUM, Kiltz. Tab. Phyc., xvi. tab. 42. Scotia Bay, 9-10 fathoms, 

 April 1903. 



1 Reprinted from the Journ. of Bot., July 1905. 



2 To this list of calcareous and other algoe, which Mr E. M. Holmes has kindly drawn up for me, I have added 

 some notes on the distribution of the species. I have omitted a few species, also recorded in the lists of Mr and 

 Mrs Gepp. R. N. R. B. 



3 This species was determined by Mr A. D. Cotton. R. N. R. 11. 



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