. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ECHINOIDEA. I. II Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially vStewart") have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ECHINOIDEA. I. II Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially vStewart") have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no .small systematic importance, as especially shown by ^Mackintosh (264—265), and they are never to be by in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Danish Ingolf-Expedition (1895-1896); Københavns universitet. Zoologisk museum. Copenhagen H. Hagerup
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Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
