412 



Ectocarpus fasciculatus is commonly distributed along the coasts of 

 the Færoes; var. refracta has been found only at the following piaces: — 

 Str.: Kvivig (!); Syd.: Kvalbo (!), Frodebo (!), Vaags Ejde (!). 



89. E. granulosus (Engl. Bot.) Ag. J. Ag., Spec. Alg., p. 21. 

 Found only in the sublittoral zone at a depth of 2 — 3 fathoms 



in sheltered stations in the bays and sounds, where it grew epi- 

 phytic on Laminaria. It has been found bearing plurilocular 

 sporangia in the middle of May and at the end of October. 



Found hitherto only near Kvannesund (Vid.) amongst some diflerent 

 algæ growing on the lamina of a Laminaria gathered by Jonsson; and 

 in Trangisvaag (Syd.) on the lamina of a Laminaria (!) and in a seine 

 (Ostenfeld). 



90. E. Hincksiæ Harv., Manual p. 59, Phycol. Brit., tab. 22; 

 Sauvageau, Observations relatives å la sexualité des Phéosporées 

 (Journal de Botanique 1896, p. 66). 



var. typica. 



var. irregularis nov. var. 



Among specimens belonging to the typical form, I have come 

 across a few examples gathered near Thorshavn in June which 

 had involucres round the plurilocular sporangia (lig. 72, e) precisely 

 similar to those described and figured by Sauvageau, 1. c, as 

 occurring round the unilocular sporangia. 



The specimens referred to the variety (fig. 72, a, b, c, d) are more 

 particularly marked by the faet that the form of the plurilocular 

 sporangia differs widely from that of the typical plant, besides 

 varying considerably in itself, and also by the plurilocular sporangia 

 being sometimes stalked. Thus, the sporangia are most commonly 

 oblong-ovate and, in contrast to those of the typical species, they 

 are broadest some way above the base and frequently taper down 

 to it. In the majority of cases they are sessile, but verv often 

 they have stalks composed sometimes of one cell only, sometimes 

 of several, in which case the sporangium may most properly be 

 said to occur terminally on a short branch. The sporangia-bearing 

 branches are sometimes erect, forming an acute angle with the 

 main filament, and sometimes recurved. The sporangia occur as 

 in the typical form in rows on the inner (upper) face of the branches. 

 The main filaments attain to a thickness of some 50 /<, and produce 

 numerous rhizoids as in the typical form. The chromatophores 



