moreover the slates, the rocks of the mountain, were the typical beds, and not the quartzite. Hence, if there are any Taconic schists or slates, those of the Taconic range are the rocks entitled to bear the name, being Taconic geographically, and Taconic by the earliest authoritative use, Prof. Emmons the authority. Prof. Emmons, in his Agricultural Report, subsequently published (in 1843), announced the Primordial beds of Bald Mt. (near Canaan Four Corners, in Columbia Co. N. Y.), as Taconic also; but this did not make them so. He referred to the Taconic the Black slates of northern Vermont, since shown to contain primordial fossils; he searched the country north and south for other Taconic rocks, and found them as he thought; and he set others on the search, not only in this country, but over the world. But all this has not changed the fact that the true Taconic beds, if any are such, are those he first so announced; and that the rest, so far as they are of different age from these, younger or older, have been dragged into the association without reason. The Taconic rocks of Berkshire and of the counties of New York just west, always bore the most prominent part in his later descriptions of the Taconic system. The error on the part of Prof. Emmons, in referring beds of other ages to the Taconic system, is not surprising, considering the difficulties in the case. But it was no less an error; and his name as a backer cannot make the wrong right. Geologists now regard the slates of Taconic Mt. and the limestone, also, as of Lower Silurian age, but later than the Potsdam sandstone. Logan refers them to the Quebec group. Whatever the period of the slates, or slates and associated limestones, to that period properly pertains the term Taconic.-Amer. Naturalist. Massachusetts, and their continuation westward into New York. These are the typical rocks on which the system was founded. On plate xi. four figures representing sections across this particular region are given. The only Vermont observations are contained in the only other section on the same plate represénting a section from Lake Champlain to Richmond, Vt., through Charlotte. No descriptiou of the rocks of this section is to be found in the text of the volume. † In figure 4 of plate xi. (referred to in the preceding note) representing a section through Graylock, the "Taconic slate" stops just west of Berlin, Rensselaer County, New York, the slates on the west being put down as "Hudson River shales," and in figs. 2 and 3, the boundary is near Petersburg, north of Berlin. The extension of the Taconic to the Hudson River appears first in Prof. Emmons' Agricultural Report, published in 1843. 66 66 on an existing Crustacean allied to the Trilobites.. 358 Bailey Prof. L. W., on the Geology of the Grand Manan. 43 Cambrian and Silurian, History of, by Dr. T. S. Hunt.. 281 Choristes elegans, Carpenter, new genus and species described. 392 348 Hisinger, on the Swedish Palæozoic Rocks.. Hitchcock C., first observations of Fossils in the Red Sandrock.. 323 .1, 119 295 323 Hunt, Dr. T. S., History of the names Cambrian and Silurian.. 281 Jeffreys, J. Gwyn, on Waldheimia septigera and Terebratula septata.. Johnston Dr. Keith, Obituary notice of. 119 258 213 471 240 477 79 368 122 Natural History Society.-See Contents. New Brunswick, Matthew on the Geology of.. Newberry on the ancient Lakes of America Nicholson Dr. H. A., on the "Colonies" of Barrande.. 89 112 188 449 217 468 326 66 Galtensis. 66 329 decorus... magnifica... Palæozoic Rocks of England and America, by Dr. T. Sterry Hunt.. Paradoxides tenellus, species described.. 66 Plants, the popular names of Platyceras primævum.. 329 312 476 476 231 220 Silurian and Cambrian in Great Britain, Dr. Hunt on. Smallwood Dr., Meteorological Results for Montreal, 1871. 281 334 362 Solar Chemistry... Soleno pleura communis.. Species, on the Origin of Spectrum Analysis. Stenotheca pauper.. Straparollina remota Taconic Controversy, Billings on.. 66 System, Dana on..... Terebratula septata...... Thompson, Prof. Allan, Address by Thompson, Sir Wm., Address before the British Association Thomson, Prof. Wyville, on Palæozoic Crinoids... PAGE 132 474 .9, 145, 150 1.29 479 471 .313, 460 479 368 146 129 345 227 107 203 351 368 18 350 363 MITCHELL & WILSON, PRINTERS, 192 ST. PETER STREET, MONTREAL. |