Archive image from page 98 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 WHAT IS EOZOON 75 bonate of lime resembling tlie cliamber-wall so closely that it is nearly impossible to make out the difference, and thus is likely to pass altogether unobserved by collectors,, and to baffle even the microscopist. (Pig. 24.) Although therefore the layers which contain well characterized Eozoon are few and far between, Fig. 21. Foraminif
Archive image from page 98 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 WHAT IS EOZOON 75 bonate of lime resembling tlie cliamber-wall so closely that it is nearly impossible to make out the difference, and thus is likely to pass altogether unobserved by collectors,, and to baffle even the microscopist. (Pig. 24.) Although therefore the layers which contain well characterized Eozoon are few and far between, Fig. 21. Foraminiferal Eock Builders. (a.) Nnniimilites Itevigata—Eocene. (b.) The same, showing chambered in- terior, (c.) Milioline limestone, magnified—Eocene, Pa,ris. (d.) Hard Chalk, section magnified—Cretaceous. there is reason to believe that in the composition of the limestones of the Laurentian it bore no small part, and as these limestones are some of them several hundreds of feet in thickness, and extend over vast areas, Eozoon may be supposed to have been as efficient a world- builder as the Stromatoporse of the Silurian and
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