Archive image from page 86 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? 63 addition multitudes of microscopic pores tlirougli wliicli tlie soft gelatinous matter can ooze and form outside finger-like or thread-like extensionsfor collecting food. In some cases tke sliell consists of a single cavity only, but in mostj after one cell is completed others are added, forming a series of cells or chambers communicating
Archive image from page 86 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? 63 addition multitudes of microscopic pores tlirougli wliicli tlie soft gelatinous matter can ooze and form outside finger-like or thread-like extensionsfor collecting food. In some cases tke sliell consists of a single cavity only, but in mostj after one cell is completed others are added, forming a series of cells or chambers communicating with each other, and often arranged spirally or other- wise in most beautiful and symmetrical forms. Some of these creatures, usually named Foraminifera, are Fig. 17. Polymorphina. A many-chambered Poraminifer. Magnified as an opaque object. Figs. 14 to 17 are from original sketches of Post-pUocene specimens. locomotive, others sessile and attached. Most of them are microscopic, but some grow by multiplication of chambers till they are a quarter of an inch or more in breadth. (Figs. 14 to 17.) The original skeleton or primary cell-wall of most of these creatures is seen under the microscope to be per- forated with innumerable pores, and is extremely thin. When, however, owing to the increased size of the shell, or other wants of the creature, it is necessary to
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Keywords: 1870, 1875, archive, book, bookauthor, bookdecade, bookpublisher, booksponsor, booksubject, bookyear, dawson_john_william_sir_1820_1899, drawing, eozoon, harvard_university_museum_of_comparative_zoology_ern, historical, history, illustration, image, life, london_hodder_stoughton, page, paleontology, picture, print, reference, vintage, zimmermann_a_albrecht_b_1860
