. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIAJIIA 23 Sagartiogeton abyssorum n. sp. Diagnosis: Pedal disc wide. Column smooth, possibly without cinclides. Margin distinct. Sphincter in its upper part reticular, in its lower alveolar, occupying only half of the thickness of the Tentacles between 90 and 100, conical, fairly long, fewer than the mesenteries at the base, their longitudinal muscles ectodermal. Actinopharynx longitudinally sulcated. More than 12 pairs of perfect mesenteries. 2 pairs of directiyes. Retrac
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ACTINIAJIIA 23 Sagartiogeton abyssorum n. sp. Diagnosis: Pedal disc wide. Column smooth, possibly without cinclides. Margin distinct. Sphincter in its upper part reticular, in its lower alveolar, occupying only half of the thickness of the Tentacles between 90 and 100, conical, fairly long, fewer than the mesenteries at the base, their longitudinal muscles ectodermal. Actinopharynx longitudinally sulcated. More than 12 pairs of perfect mesenteries. 2 pairs of directiyes. Retractors of the mesenteries banddike but often more or less separated from. Fig. 20. >>iigaiiiijijciijti ahijssoruni. Sphincter. the mesenteries, in extreme cases forming a band-like transversal circumscript formation. Parietobasilar muscles weak but forming a little shelf. Nematocysts of the column partly 30-36 x 5//, micro- basic , partly X 3/^ basitrichs, those of the tentacles partly 41-50 x about , often a little curved, microbasic amastigophors, partly , basi- trichs, those of the actinopharynx partly 35-41 X (6)//, micro- basic /)-mastigophors, partly 31-38X about (4)/;, common, basi- trichs, those of the filaments partly —5//, p-mastigophors, ]«irtly , basitrichs, those of the acoutia partly , amastigophors, partly , partly , both basitrichs. Spirocysts of tentacles up to about 46 • 5/^ Colour unknown. Size of the best preserved specimen: breadth of cm, height of the body about I ciii. leilal tlisc Exterior usj)ect: Both specimens were strongly contracted, the one very damaged in its upper part. The pedal disc was l>road anil irregularly folded, that of the damaged specimen drawn out in two portions, the one considerably longer than the other. The column irregularly wrinkled. I cannot decide if cinclid
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
