Archive image from page 554 of The depths of the ocean. 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 depthsofoceangen00murr Year: 1912 pr '' abundance. The sea-slugs Stichopus tremulits and Mesothuria 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 TrocJiostonia (see Fig. 361). The sea-mice are represented by Pourtalesia (see Fig. 362), a very re
Archive image from page 554 of The depths of the ocean. 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 depthsofoceangen00murr Year: 1912 pr '' abundance. The sea-slugs Stichopus tremulits and Mesothuria 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 TrocJiostonia (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, Ech in oca rdui ;?z and Brissopsis (character- fig. 359. istic of our fiords and BathyHastervexillifer, Reduced. (After Bell.) coast-banks), and the ordinary sea-urchins are no longer to be found. Huge sea- lilies or feather- stars [Antedon esckrickti, see Fig. 363, and A. pro- /za'rt;), and quantities of the medusa's head [Gorgono- cephalus eiicnemis), are attached most likely either to Um- belhda 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 There are gigantic representatives of the Fig. 360. Hytnenasier pellitcidus, Wy. Thorns, Michael Sars, along the bottom.
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