. Botanisk tidsskrift. Plants; Plants -- Denmark. 160 Pericysts are abundantly occurring in my specimens, but I have never met with hairs. Tlie unilocular sporangia are usually sessile and resemble precisely the figures given by Reinke (1. c.) and Kuckuck (1. c), but stalked sporangia are also occurring, as pointed out by Kuckuck and Sauvageau. It was gathered w'ith unilocular sporangia in December and June. The species occurs in the upper litoral region often in company with S. britannica, but I have also met with it in a depth of 3—4 fathoms. E. Icel. Eskifjori^ur (Stromfelt). N. Icel. Arnam
. Botanisk tidsskrift. Plants; Plants -- Denmark. 160 Pericysts are abundantly occurring in my specimens, but I have never met with hairs. Tlie unilocular sporangia are usually sessile and resemble precisely the figures given by Reinke (1. c.) and Kuckuck (1. c), but stalked sporangia are also occurring, as pointed out by Kuckuck and Sauvageau. It was gathered w'ith unilocular sporangia in December and June. The species occurs in the upper litoral region often in company with S. britannica, but I have also met with it in a depth of 3—4 fathoms. E. Icel. Eskifjori^ur (Stromfelt). N. Icel. Arnames (0. D.). NW. Icel. Broddanes. SW. Icel. Reykjavik; NjarSvik (CO.). S. Icel. Vestmannaeyjar. SpliiK'elaria olivacea Pringsh., emend. Sauvag. Sphacelaria p. 54. I have met with some specimens of a Sphacelaria growing epiphyti- cally on the stem of Laminaria hyperborea. They were all sterile and without propagulfe. The basal portion is a disc with marginal growth (Fig. 17, a) consisting of several layers of cells (Fig. \7 ,b,c). Hairs are absent, and 1 have only seen some few large cells of the same colour as the other cells, which I think may be regarded as peri- cysts. The erect filaments are 20—30 a thick, and bear only some few branches. I have re- ferred my specimens to S. olivacea Pringsh. on account of the struc- ture of the basal disc. Regarding the divisions of the pericentral cells they also agree with the figures given by Sauvageau. As all my specimens are sterile and seem to be in younger stages of age, my determination is probably doubtful. NW. Icel. DyrafjorOur (CO.). SW. Icel. Einarslon. S. Icel. Vestmannaeyjar. Chietopteris pliimosa(Lyngb.) Kiitz., Sauvag. Sphacelaria p. 144; Stromf. Algveg. p. 52, Roseiiv. , Reinke Atlas Tab. 49-50. I have met with this species at low-water mark and down to a depth of 10 fathoms. Most of my plants were gathered in the summer, and are sterile. Specimens having unilocular and plurilocular sporangia were gathe
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