. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 150 ACTINIARIA in Ulfsfiord, littoral (1861), Grotsund littoral (1861), Tromso littoral (Kier 1902, Dons 1910, 3 m, Dons 1912), Gibostad 3 m (Dons 1912), Sorvaer (Ohlin 1890). Kola peninsula: The Russian biological Station, Kolafiord (Derjugin 1906), I,adi- gano, Cliewanna 30 fms. (Sandeberg 1877), Vaideguba littoral (Sandeberg 1877), Semiostrowa 50—55 fms. (Sandeberg 1877), lyitsa (Sandeberg 1876), Scharetskaja (lyilljeborg 1848). Kara Sea: Jugor Shorr off Chabarova 5—8 fms. (Vega-Exp.). Arctic Sea of Sibiria: 20' off Cape
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 150 ACTINIARIA in Ulfsfiord, littoral (1861), Grotsund littoral (1861), Tromso littoral (Kier 1902, Dons 1910, 3 m, Dons 1912), Gibostad 3 m (Dons 1912), Sorvaer (Ohlin 1890). Kola peninsula: The Russian biological Station, Kolafiord (Derjugin 1906), I,adi- gano, Cliewanna 30 fms. (Sandeberg 1877), Vaideguba littoral (Sandeberg 1877), Semiostrowa 50—55 fms. (Sandeberg 1877), lyitsa (Sandeberg 1876), Scharetskaja (lyilljeborg 1848). Kara Sea: Jugor Shorr off Chabarova 5—8 fms. (Vega-Exp.). Arctic Sea of Sibiria: 20' off Cape Jakan 12 fms. (Vega-Exp.), 2 miles north of the winterharbourof the Vega67°4'4g"N. I73°23'2" W. (Vega-Exp.), Behring sound 67°4'N. I73°24'6" W. 7—9 fms. (Vega-Exp.). Further distribution. North America. Arctic ocean to Cape Cod (teste Parker). Cape Elisa- beth Me., Eastport Me., Grand Menan N. crevices of rocks near low-water mark, Cumberland Bay (teste Verrill), Passamaqvoddy Bay St. Andrews on rocks (teste Mc. Murrich). From Maine to Greenland (teste Verrill). The anatomy of this species has been described before by Mc. Murrich (1910), wherefore I find a recapitulation unnecessary, but will add some supplementary remarks to his description. The longitudinal muscles of the tentacles are ectodermal and resemble those of C. spetsbergensis, described below, the muscle folds however show no tendency here to be mesogloeal. The radial muscles of the oral disc are a little weaker and ectodermal (verified on several specimens). In 8 specimens collected from different locahties, among others from Eastport, I have more closely examined the sphincter. In all specimens it was of a palmate type. In no case the secondary lamellae issue from any distinct main lamella — in a specimen from Frederikshaab there is, however, an indication of a main lamella. Now the sphincter was more broad with distinct palmate extension of the lamellae, now it was more narrow and
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscienti, bookyear1921
