. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 74 ACTINIARIA as those in the endoderm of the cohimn here and there occur. Tlie parietal muscles' are in the reproduc- tive region strong with numerous folds and on transverse-sections of a rounded appearance (textfig. 92), in the capitular tract considerably weaker and arranged more or less in the shape of a fan (textfig. 90, 91). The part of the parietal muscles which expands on the co- lumn is considerable and as broad as the parietal muscle-pennon itself. The mesenterial jSlaments have a typical appearance. The animal is
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 74 ACTINIARIA as those in the endoderm of the cohimn here and there occur. Tlie parietal muscles' are in the reproduc- tive region strong with numerous folds and on transverse-sections of a rounded appearance (textfig. 92), in the capitular tract considerably weaker and arranged more or less in the shape of a fan (textfig. 90, 91). The part of the parietal muscles which expands on the co- lumn is considerable and as broad as the parietal muscle-pennon itself. The mesenterial jSlaments have a typical appearance. The animal is dioecious. Biology : The animal lives unattached, mainly on sand (Appellof) or on sto- nes, or attached to shells? {Lecythia according to Sars). Remarks: Whether Sars's Lecythia brevicornis is identical with Appellof's Edwardsia carnea is very dif- ficult to decide; on the other hand the species described by Appellof is the same species as Edwardsia Sarsii Diib. & Koren, which I have been able to substantiate on specimens belonging to the Museum of Christiania and labelled "Ed- wardsia sarsii Diib. & Koren, Bergen, Manger, Sars". As to Lecythia it is possible that Sars's description alludes to the species later on described by Gosse as Edwardsia car- nea ; in reality S ars's figure and description of this species and its occurrence on Saxicava more recall Edwardsia carnea Gosse than Paraedwardsia carnea (Diib. & Koren). As it is, however, hardly possible to decide these 1 Appellof (1891, p. 21) states that the parieto-basilar muscles are absent in E. carnea. This is certainly not the as the part of the parietal muscles ou the opposite side of the pennons corresponds to the parieto-basilar muscle (com- pare Carlgren iyo5, p. 5i7_5i8).. Textfig. 88—92. Paraedwardsia sarsii. Fig. 88: Transverse section of pennon in the reproductive tract. Fig. 89: Transverse section of a mesentery in the uppermost part of the cnido-glandular tract (in the capitular r
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscienti, bookyear1921
