415 



92. E. tomentosoides Farl., New or imperf. known Algæ of U.S., 

 reprint from Bull. Torr. Bot. Club, Vol. XVI, 1889, p. 11, pi. 87, fig. 4; 

 Rosenw, Grønl. Havalg., p. 890; Gran, En norsk form af Ectocarpus 

 tomentosoides Farlow; Kuckuck, Ueber Polymorphie bei einigen 

 Phaeosporeen (Festschrift fur Schwendener). 



Besides basal plurilocular sporangia, such as tbose figured by 

 Rosen vinge and Kuckuck, 1. c, I have also come across basal 

 nniloeular sporangia, as I cannot doubt that the few I found must 

 be regarded as such. These dehisced at their apex, and were 

 about 40 [i long and about 12 fi broad. 



Grows as an endophyte in the stem and lamina of Laminaria 

 hyperborea, digitata and saccharina covering them with a short, 

 fine, matted growth. 



Specimens bearing plurilocular sporangia were met with from 

 March to June. It undoubtedly attains to its highest development 

 late in winter, i. e. March to April, as in a collection consisting of 

 fragments of Laminaria gathered by Jonsson in March near 

 Thorshavn large quantities of vigorously developed piants were 

 met with which exactly agreed with Kuckuck's lig. 6 (1. c), while 

 later in the year it only occurred in small quantities and in poorly 

 developed specimens; its occurrence as an early spring plant agrees 

 also with Gran and Kuckuck's report. In Greenland, on the 

 other hånd, it has been found as late as August. 



In a glass vessel containing Rhodymenia palmata, which I had 

 gathered near Thorshavn for the sake of its different epiphytes, I 

 found Eet. tomentosoides also amongst Myrionema globosnm and others, 

 but whether this alga really grow r s on Rhodymenia palmata or not 

 I have not been able to ascertain ; at any rate I did not succeed in 

 tinding endophytic filaments, but it is just possible that these typical 

 filaments of Eet. tomentosoides were allied to the plant I have called 

 with a query Myrionema globosum (cfr. 421); and in referring to my 

 description of the latter for further particulars I will here only add 

 that it bore a striking resemblance to Eet. tomentosoides. 



This species, which doubtless in early spring occurs as a very 

 common endophyte in La/m'narza-species, has hitherto been found in the 

 i'ollowing piaces: — Ost.: Ejde I , Fuglefjord (!); Str.: Thorshavn H.J., !); 

 Syd.: Trangisvaag (Ostenfeld). 



').'}. E. lucifugus Kuck., Ueber zwei hohlenbewohnende Phaeo- 

 sporeen (Beitråge zur Kenntnis der Meeresalgen, 4, Kiel und Leipzig 

 1897). 



