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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.
Akad. zu Berlin" April 1845: POLYGASTRICA. Fragilaria rhabdosoma. Gallionella distans. Pinnularia? PHYTOLITHARIA. Lithodontium Bursa. Lithodontium furcatum. Lithostylidium exesum. Lithostylidium rude. Lithostylidium Serra.
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