The microscope and its revelations . Fig. 210. Podocyrtis 211. Hhopalocanimn ornatum. from the bottom of the Atlantic Ocean, at depths of from1000 to 2000 fathoms. They appear to have been much moreabundant, however, during the later geological periods; fornot only have certain forms (among them Haliomma, Eig. 212) Fig. 212. Fig. Fig, 212. Haliomma , 213. Ferichlamydium prcBtextum. rOLYCYSTIXA OF BAEEADOES. 521 been detected bv Prof. Elirenberg in the chalks and marls ofSicily and Greece, and of Oran in iifrica, and also in the diato-maceous deposits of
The microscope and its revelations . Fig. 210. Podocyrtis 211. Hhopalocanimn ornatum. from the bottom of the Atlantic Ocean, at depths of from1000 to 2000 fathoms. They appear to have been much moreabundant, however, during the later geological periods; fornot only have certain forms (among them Haliomma, Eig. 212) Fig. 212. Fig. Fig, 212. Haliomma , 213. Ferichlamydium prcBtextum. rOLYCYSTIXA OF BAEEADOES. 521 been detected bv Prof. Elirenberg in the chalks and marls ofSicily and Greece, and of Oran in iifrica, and also in the diato-maceous deposits of Bermuda and Richmond (Virginia); buta large proportion of the rock that prevails through anextensive district in the island of Barbadoes, has been found byhim to be composed of Polycystina, mingled with Diatomacese, Fig. 2U.
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