. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. Fig. 359. Bathybiaster vexillifer, Wy. Thorns. Reduced. (After Bell.) abundance. The sea-slugs Stichoptis tremulus and Mesotkuria intestinalis so charac- teristic of the deep parts of our fjords, are entirely absent, but in- stead of these forms with foot-suckers we have a footless genus Trochostoma (see Fig. 361). The sea-mice are represented by Pourtalesia (see Fig. 362), a very remark- able ge
. The depths of the ocean; a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. Oceanography. Fig. 359. Bathybiaster vexillifer, Wy. Thorns. Reduced. (After Bell.) abundance. The sea-slugs Stichoptis tremulus and Mesotkuria intestinalis so charac- teristic of the deep parts of our fjords, are entirely absent, but in- stead of these forms with foot-suckers we have a footless genus Trochostoma (see Fig. 361). The sea-mice are represented by Pourtalesia (see Fig. 362), a very remark- able genus that in some respects re- sembles forms long extinct, but Spatangus, Echinocardium and Brissopsis (character- istic of our fjords and coast-banks), and the ordinary sea-urchins are no longer to be found. Huge sea- lilies or feather- stars (Antedon eschrichti, see Fig. 363, and A. pro- lixd), and quantities of the medusa's head (Gorgono - cephalus eucnemis), are attached most likely either to Um- bellula or to the numerous sponges, Cladorhiza sp., whose hard central axis and tree-like ramifying shape make it so conspic- uous, someof which sometimes form regular thickets along the bottom. There are gigantic representatives of the. Fig. 360. Hymenasier pelhicidus, Wy. Thorns. Michael Sars," 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 Murray, John, Sir, 1841-1914; Hjort, Johan, 1869-. London Macmillan
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