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Updated: June 10, 2025
It is this which compels me to stay here till I have finished my work. I should add that M. Elie de Beaumont has also been kind enough to place at my disposition the fossil fishes from the collection at the Mining School, and that M. Brongniart has made me the same offer regarding his collection, which is one of the finest among those owned by individuals in Paris. . .
Portion of a section, showing the large sporangia in their natural position, and each supported by its bract or scale. c. Spores in these sporangia, highly magnified. In the Carboniferous strata of Coalbrook Dale, and in many other coal-fields, elongated cylindrical bodies, called fossil cones, named Lepidostrobus by M. Adolphe Brongniart, are met with.
The soil is fertile, but the village, being in a state of ruin, and having several pools of stagnant water, is very unhealthy. The bottom rock is the akose of Brongniart, or granitic grit, and several conical hills of trap have burst through it.
The connection of the roots with the stem, previously suspected, on botanical grounds, by Brongniart, was first proved, by actual contact, in the Lancashire coal-field, by Mr. Binney. The fact has lately been shown, even more distinctly, by Mr. Richard Brown, in his description of the Stigmariae occurring in the under-clays of the coal-seams of the Island of Cape Breton, in Nova Scotia.
The coal-period was called by Adolphe Brongniart the age of Acrogens, so great appears to have been the numerical preponderance of flowerless or cryptogamic plants of the families of ferns, club-mosses, and horse-tails.
I have even observed that they resemble astonishingly the forests of the Molasse epoch, and the analogy is heightened by that between the animals of this country and those of the eastern coasts of Asia as compared with those of the Molasse, such as the chelydras, andreas, etc. I will send a report upon this to M. Brongniart as soon as I have the time to prepare it.
Brongniart, in 1849, as coming from the "Gres bigarre," or Bunter, not one is common to the Keuper. The footprints of Labyrinthodon observed in the clays of this formation at Hildburghausen, in Saxony, have already been mentioned.
The weight of the incumbent strata squeezing down the compressible dirt-bed has caused the Cycads to assume that form which has led the quarrymen to call them "petrified birds' nests," which suggested to Brongniart the specific name of nidiformis. I am indebted to Mr.
M. Brongniart, in his report on M. Gay's labours "Annales des Sciences" 1833, considers that the boulders in the Cachapual belong to the same class with the erratic boulders of Europe.
The weather being fine, we made excursions in the neighbourhood. At Sèvres I saw two pieces of china; on one of them was a gnu, on the other a zebra. Somerville had told me that soon after his return from his African expedition, he had given the original drawings to M. Brongniart then director of the manufactory.
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