. Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen. Fig. 171.—Salenia, a Sea-Urchin (Challenger). A SEA-CUCUMBER 243. Fig. 172.—A Sea-Cucumber or Trepang (Challenger ). 244 ANIMALS OF THE SEA FLOOR (Entomostraca). It is perhaps not out of place tosuggest here that, in order to capture these smallerforms, the water in which dredged material has beenput to stand should be strained off through a pieceof fine silk. Of these Entomostraca, but very unlikethe rest in appearance, are the Cirripedes, includingboth the stalked barnacles and the
. Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen. Fig. 171.—Salenia, a Sea-Urchin (Challenger). A SEA-CUCUMBER 243. Fig. 172.—A Sea-Cucumber or Trepang (Challenger ). 244 ANIMALS OF THE SEA FLOOR (Entomostraca). It is perhaps not out of place tosuggest here that, in order to capture these smallerforms, the water in which dredged material has beenput to stand should be strained off through a pieceof fine silk. Of these Entomostraca, but very unlikethe rest in appearance, are the Cirripedes, includingboth the stalked barnacles and the sessile acorn-shells. The stalked forms are for the most partfound growing on floating objects, but there is onegenus (Scalpellum) with a short stalk, which is oftenfound in deep water attached to Hydroids or otherfixed objects (Fig. 159, p. 218). The sessile or acorn-barnacles are most abundant between tide-marks orin shallow water, but there are a few deep-sea specieswhich reach a very large size. Of the other Ento-mostraca, the Branchiopods belong to the Plankton(Chapter V.), but the Copepods and Ostracods havemany bottom representatives. There are two very large g
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectocean, bookyear1912
