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Organic bodies forming the ooze of the bed of the Atlantic at great depths. Globigerina bulloides. Actinocyclus. Pinnularia. Eunotia bidens. Spicula of sponge. Great light has recently been thrown upon the origin of the unconsolidated white chalk by the deep soundings made in the North Atlantic, previous to laying down, in 1858, the electric telegraph between Ireland and Newfoundland.
In the latitude of Kerguelen they are less numerous and smaller, while further south they are still more dwarfed, and only one variety, the typical Globigerina bulloides, is represented. The living Globigerinoe from the tow-net are singularly different in appearance from the dead shells we find at the bottom.
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