. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ever, be two cycles of tentacles as in other Peachia species. The little oral disc is provided with indistinct radial furrows. The actinopharynx is long and has numerous longitudinal furrows (PI. i, fig. 30). I cannot decide its length in proportion to that of the column, as the proximal part of the specimen was torn off. The siphonoglyphe is ver>' broad and smooth with well developed aboral prolongation. The conchula forms three rectangular, flat lobes (PI. i, fig. 30) which are longer
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ever, be two cycles of tentacles as in other Peachia species. The little oral disc is provided with indistinct radial furrows. The actinopharynx is long and has numerous longitudinal furrows (PI. i, fig. 30). I cannot decide its length in proportion to that of the column, as the proximal part of the specimen was torn off. The siphonoglyphe is ver>' broad and smooth with well developed aboral prolongation. The conchula forms three rectangular, flat lobes (PI. i, fig. 30) which are longer than they are broad, and in the apex pressed a little in. On the figures of Danielssen and Koren (Fauna httoralis Norvegiae) it looks as if the conchula, in ex- tended state, would be pedunculate; in the preserved specimen the conchula has no such appearance, but the basal part of each specimen is built as in other threelobed Peachia- species. Anatomical description: Only the distal part of the type-specimen being left, and this piece not being well preser\'ed, I cannot give any complete description of the anatomy of tliis species. The nematocysts in the ectoderm of the column are numerous and 14—17 X (1,5)—2 [i in size, those of the tentacles are still more numerous, 19—29 fi long and 2—2,5 ^ broad, so are also the spirocysts, reaching a size of 14 X 1,5—26 x 2,5 /i. The nematocysts of the acti- nopharj'nx are 24—26 u long and about 3,5—4 [i broad. In all nematocysts the basal part to the spiral thread is visible. The nematocysts of the actinopharynx are broader in the basal end, tlie others of equal breadth. The siphonoglyphe is devoid of stinging capsules. The longitudinal muscles of the tentacles form rather high folds, arranged like sipho- noglyphe is furnished with ectodermal longitudinal muscles which are wanting in the other part of the actinopharynx. The arrangement of the mesenteries is jirobably like that of other PeacAia-species. As I hav
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
