. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. OCTOCORALLIA 41 overlapping sclerites, oval or more rounded in shape (fig. 30 l-a). These scales are usually small, about () nun in diameter, the largest having a diameter of about nun. They are not warty, but have on their outside more or marke<l, concentric ridges which are the impressions of the overlaji^jing scales. Both and all the other sclerites of the colony are delicately stri])i'd from the sclerite-centre ("nucleus") outwards towards the edge


. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. OCTOCORALLIA 41 overlapping sclerites, oval or more rounded in shape (fig. 30 l-a). These scales are usually small, about () nun in diameter, the largest having a diameter of about nun. They are not warty, but have on their outside more or marke<l, concentric ridges which are the impressions of the overlaji^jing scales. Both and all the other sclerites of the colony are delicately stri])i'd from the sclerite-centre ("nucleus") outwards towards the edges. In the coenenchyma of the stem, one layer of scale-like .sclerites is found imbricately covering each other from the bottom u])- wards. .scales (fig. 30 e-A:) are thin, with a smooth outside and an inside which is more or less warty, especially in the basal portion, with sometimes fairlv large, rugged warts (fig. .30 /), The .sclerites are usually oval in the longitudinal direction of the .stem and with an eccentric jilaced sclerite-centre (fig. 30 /, I). They mav, however, be oval in a direction across of the .stem (fig. 30 y, h) and have then a mori' centrally placed sclerite-centre. Their outlines are usually fairly regular; only in their part, where they are attached into the coenenchyma, they may be somewhat irregular. Their size usually varies by al)out mm ( mm). The zooid whorls in some of the colonies of l)ut two zooids ])laced opposite, usually, however, there are in the colony both whorls with two and three zooids (cf. the above- stated descriptions of the habitus of some of the colonies). The intervals between the whorls (the "iuternodes") vary .somewhat, but are always a little longer than the length of the verrucae (= the contracted zooid). All the zooids are contracted and closely against the stem (fig. .30 a). They (the verrucae) measure in length about ') 2 mm, usually bv 0


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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions