6 CARL SKOTTSBERG, MARINE ALGiE 1. PH^OPHYCE^. 



specimens; in the plant with gametangia there are short, irregular fertile branches, 

 that seem to correspond to the sterile ramelli in the other plant. 



* firma Kjellm. 



Large forms with all the branches conspicuously attenuate, not rarely ending 

 in a hair. — Fuegia: Admiralty Inlet, Hope Bay, common with Ahnfellia (St. 13, 

 25. 3. 08, sp.). Falkland Islands: Stanley Harbour, on pebbles (St. 1,3. 11. 

 07, sp.). 



Distribution of P. litoralis: subcosmopolitan. 



Fig. 1. a Pylaiella litoralis i. rigidiuscula, X 55. b— d f. botryoclada: b branches with sporangia, X 180; C with 

 gametangia, X 180; d sterile branchlets, X 180. e — f Ectocarpua falklandicus, e X 55 ; i X 180. 



Ectocarpus Lyngb. 



E. exiguus Skottsb. Ant. Meeresalg. I p. 5. 



This I believe to be the E. humilis of Reinsch non Kutz., at least its var. (J, 

 found growing on Desmarestia at South Georgia. I do not know the varieties a and 

 Y, the latter quoted from the Mediterranean. This time I have rich material from 

 South Georgia, on Desmarestia ligulata. It is of confervoides-type as to the shape of 

 gametangia and chromatophores, but the dimensions are decidedly smaller and the 



