142 KJELLMAN, THE ALGA OF THE ARCTIC SEA. 
Gen. Cruora (IFr.) J. G. Ac. 
Sp. Alg. 2, p. 490; Fr. Fu: Scan. p. 316; lim. mut. 
Cruoria pellita (Lynes.) Fr. 
l. e. p. 317. Cheetophora pellita Lynes. Hydr. Dan. p. 193. 
Descr. Cruoria pellita J. G. Ac. lc. p. 491. 
hig. » »  Tuur. in Le Jol. Liste Alg. Cherb. t. 4. 
Eesice. » »  Arescu. Alg. Scand. exsice. N:o 309. 
Habitat. The present species, like the preceding one, is a litoral alga, at least in 
the Norwegian Polar Sea, attached to stones. Only sterile specimens have been met 
with. These were collected in summer. The plant probably here, as on the west coast 
of Sweden, develops its reproductive organs in winter. About the habitat of the plant 
in Baftin Bay I know nothing. 
Geogr. Distrib. It belongs both to the Atlantic and the arctic region of the Polar 
Sea, being only little spread in both. It cannot be determined, by means of existing 
statements, how far it goes northwards. 
Localities: The Norwegian Polar Sea: Nordlanden, commonly dispersed, but scanty. 
Lafjin Bay: on the west coast of Greenland, according to specimens in the Royal 
Swedish Museum, brought home by Prof. Tu. M. Friss. 
Gen. Heemescharia nob. 
Frondes depresso-hemisphericee in crustam mucosam confluentes, duobus stratis contexte, inferiore tenui 
filis decumbentibus, superiore filis verticalibus muco uberiore laxius conjunctis constante. Fila verticalia triplicis 
generis: 1:0 longiora et tenuiora vegetativa, 2:0 longiora et tenuiora trichogynas vulgo plures portantia, 3:0 
breviora et crassiora partes definitas frondis formantia, quorum articuli, foecundatione peracta, singuli sporam 
singulam generant. 
Hawmescharia polygyna nob. 
H. frondibus minutis, purpureo-sanguineis. 
Tab. 11. 
Description. The plant forms small, flattened-hemispherical, gelatinous masses, 
which are confluent so as to constitute a crust of about one centimeter in diameter. It 
consists of a horizontal, feebly developed basal layer composed of cellular filaments 
connected with one another by a gelatinous substance, and of a thickening layer, that 
issues from this basal layer and consists of vertical rows of cells held together by a 
profusion of gelatine and easily separated in pressing. These rows are generally simple 
and vary in different parts of the frond, being sometimes comparatively long (about 
250 «.) and slender (6—8 «.), composed of numerous, 15—20, cylindrical cells, which 
are even twice as long as thick. I believe these cell-rows to be vegetative; fig. 1, 3. 
In other parts of the frond several of the vertical cell-rows exhibit the appearance 
shown by fig. 7 and 8, i. e. from the terminal cell or the articular cells there issues 
