. The dawn of life [microform] : being the history of the oldest known fossil remains, and their relations to geological time, and to the development of the animal kingdom. Paleontology; Life; Paléontologie; Vie. THE PRESERVATION OP EOZOON. 125 according to Giirabel, present the same connecting cylinders and branching stems as the pargasite, and are by him supposed to have been moulded in the same manner. . Yery beautiful evidences of the same organic structure consisting of the casts of tubuli and their ramifications, were also ob- served by Giimbel in a purely crystalline limestone, enclosin
. The dawn of life [microform] : being the history of the oldest known fossil remains, and their relations to geological time, and to the development of the animal kingdom. Paleontology; Life; Paléontologie; Vie. THE PRESERVATION OP EOZOON. 125 according to Giirabel, present the same connecting cylinders and branching stems as the pargasite, and are by him supposed to have been moulded in the same manner. . Yery beautiful evidences of the same organic structure consisting of the casts of tubuli and their ramifications, were also ob- served by Giimbel in a purely crystalline limestone, enclosing granules of chondrodite, hornblende, and garnet, from Boden in Saxony. Other specimens of limestone, both with and without serpentine and chondrodite, were examined with- out exhibiting any traces of these peculiar forms; and these negative results are justly deemed by Giimbel as going to prove thab the structure of the others is really, like that of Eozoon, the result o£ the intervention of organic forms. Besides the minerals observed in the replacing substance of Eozoon in Canada, viz., serpentine, pyroxene, and loganite, Giimbel adds chondrodite, hornblende, scapolite, and probably also pyrallolite, quartz, iolite, and dichroite," (D.) Glauconites. The following is from a paper by Dr. Hunt in the Report of the Survey of Canada for 1866 :— " In connection with the Eozoon it is interesting to examine more carefully into the nature of the matters which have been called glauconite or green-sand. These names have been given to substances of unlike composition, which, however, occur under similar conditions, and appear to be chemical deposits from water, filling cavities in minute fossils, or forming grains in sedimentary rocks of various ages. Al- though greenish in colour, and soft and earthy in texture, it will be seen that the various glauconites diflTer widely in composition. The variety best known, and commonly regarded as the type of the glauconites, is that
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