Archive image from page 186 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 CONTEMPOEAEIES AND SUCCESSOES OF EOZOON. 159 tubeSj or groups of tubes wMcli in each, successive floor give out radiating and branching canals exactly like those of Eozoon, though more regularly arranged; and if we had specimens with the canals infiltrated with glauconite or serpentine the resemblance would be perfect. When, as in figs. 44 and 45 A, these
Archive image from page 186 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 CONTEMPOEAEIES AND SUCCESSOES OF EOZOON. 159 tubeSj or groups of tubes wMcli in each, successive floor give out radiating and branching canals exactly like those of Eozoon, though more regularly arranged; and if we had specimens with the canals infiltrated with glauconite or serpentine the resemblance would be perfect. When, as in figs. 44 and 45 A, these canals are seen on the abraded surface they appear as little grooves arranged in stars which resemble the radiating plates of corals, but this resemblance is altogether superficial, and I have no doubt that they are really Fig. 44. Caunopora planulata, Hall—Devonian; showing the radi- ating canals on a weathered surface. {After Hall.) foraminiferal organisms. This will appear more dis- tinctly from the sections in fig. 45 B, c, which repre- sents an undescribed species recently found by Mr. Weston, in the Upper Silurian limestone of Ontario. There are probably many species of these curious fossils, but their discrimination is difficult, and their nomenclature confused, so that it would not be profit- able to engage the attention of the reader with it except in a note. Their state of preservation, how- ever, is so highly illustrative of that of Eozoon that a word as to this will not be out of place. They are
Size: 1827px × 1094px
Photo credit: © Bookive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1800, 1870, 1875, americana, archive, biodiversity, book, bookauthor, bookcentury, bookcollection, bookcontributor, bookdecade, bookpublisher, booksubject, bookyear, dawson_john_william_sir_1820_1899, drawing, eozoon, harvard_university, harvard_university_museum_of_comparative_zoology, historical, history, illustration, image, life, london_hodder_stoughton, museumofcomparativezoology, page, paleontology, picture, print, reference, vintage
