. The Canadian record of science. Natural history. 214 Canadian Record of Science. of Archseosphserinse. It is a small or young specimen, of a flattened oval form, 2^ inches in its greatest diameter and of no great thickness. It is a perfect cast in serpentine, and completely weathered out of the matrix, except a small portion of the upper surface, which was covered with limestone which I have carefully remov- ed with a dilute acid. The serpentinous casts of the cham- bers are in the lower part regularly laminated; but they are remarkable for their finely mammilated appeai-ance, arising from t
. The Canadian record of science. Natural history. 214 Canadian Record of Science. of Archseosphserinse. It is a small or young specimen, of a flattened oval form, 2^ inches in its greatest diameter and of no great thickness. It is a perfect cast in serpentine, and completely weathered out of the matrix, except a small portion of the upper surface, which was covered with limestone which I have carefully remov- ed with a dilute acid. The serpentinous casts of the cham- bers are in the lower part regularly laminated; but they are remarkable for their finely mammilated appeai-ance, arising from their division into innumerable connected chamberlets resembling those of Archaiosphaerinee. In the upper part the structure becomes acervuline, and the cham- berlets rise into irregular prominences, which in the recent state must have been extremely friable, and, if broken up and scattered over the surfaces of the beds, would not be distinguishable from the ordinary Archseosphserinse. This specimen thus gives further probability to the view that the Archseosphserinse may be for the most part detached cham- berlets of Eozoon, perhaps dispersed in a living state and capable of acting as germs. Other specimens weathered out and showing granular forms have been collected by Mr. E. H. Hamilton and are now in the Museum. 6. Specimens of Eozoon have been traversed by veins of chrysotile and calcite which cross all their structures indif- ferently, and often seriously affect their preservation. But similar accidents have affected fossils of every age, and es- pecially those of the older and more altered rocks. The. Fig,10. Chrysotile vein^crossing Eozoon, magnified, (a) Vein of fibrous Serpen- tine or Chrysotile; (6) Tubulation of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Mo
Size: 1849px × 1352px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1884
