. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. PORIFERA. II. IOI to the figure given by Wyville Thomson, in The Depths of the Sea - 187, of Chondrocladia virgata. In this sponge all the brahchlets show a swelling in the middle mentioned by the author as a dark greenish oval mass of granular sponge matter;, a description that might very wel be used of an embryo situated in the branchlet. Wyville Thomson says that the branchlets end with a very narrow osculum. Carter also mentions the swelling, but has found no osculum; it may perhaps have been distinct, when the sponge in
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. PORIFERA. II. IOI to the figure given by Wyville Thomson, in The Depths of the Sea - 187, of Chondrocladia virgata. In this sponge all the brahchlets show a swelling in the middle mentioned by the author as a dark greenish oval mass of granular sponge matter;, a description that might very wel be used of an embryo situated in the branchlet. Wyville Thomson says that the branchlets end with a very narrow osculum. Carter also mentions the swelling, but has found no osculum; it may perhaps have been distinct, when the sponge in its fresh state was examined by Wyville Thomson, and have been closed later. If the mentioned swellings in the branchlets are owing to embryos, there is the curious peculiarity that an embryo is found in each branchlet. The quoted one of Armauer Hansen's figures of the exterior may with certainty be referred to this species; also one of the specimens of his C. abyssicola which I have examined proved to be the present species. Of the spicula-figures those on PI. IV, figs. 4—5 belong with some probability to this species. Also Fristedt's C. abyssicola proved, by my examining a fragment sent to me, to be the present species. Locality: Station 15, 66° 18'Lat. N., 250 29' Long. W., depth 330 fathoms (bottom temperature -=- o°75 C), station 143, 620 58' Lat. N., 70 09' Long. W., depth 388 fathoms (bottom temperature -HO°4C); further 650 57' Lat. N., 270 00' , depth 336 fathoms (bottom temperature 0°) (Wandel). The mentioned stations are situated in the Denmark Strait and north of the Faroe Islands. The species appears to be a native of the cold bottom, or the border of it. From station 3 with a bottom temperature of o°5 C. we have a fragment consisting of denuded skeletal parts. This fragment has surely been dead long, as a Suberitid, and other forms are growing on it, and it has moreover lost something of its original firmness. Therefore it must be supposed to have be
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