. The geological history of plants. Paleobotany; 1888. LAURENTIAN AND EAELY PALEOZOIC. 21 have been allied to the club-mosses. This seems to be all that we at present know of land-vegetation in the So far as the remains go, they indicate 1 the presence of the Ifamilies of Ehizo- jcarps and of Lyco- ipods. If we ascend into the Upper Si- lurian, or Siluri- an proper, the evi- dences of land veg- etation somewhat increase. In 18591 described, in " The Journal of the Geo- logical Society," of London, a remark- able tree from the Lower Erian of Gasp6, under the name Pro
. The geological history of plants. Paleobotany; 1888. LAURENTIAN AND EAELY PALEOZOIC. 21 have been allied to the club-mosses. This seems to be all that we at present know of land-vegetation in the So far as the remains go, they indicate 1 the presence of the Ifamilies of Ehizo- jcarps and of Lyco- ipods. If we ascend into the Upper Si- lurian, or Siluri- an proper, the evi- dences of land veg- etation somewhat increase. In 18591 described, in " The Journal of the Geo- logical Society," of London, a remark- able tree from the Lower Erian of Gasp6, under the name Prototaxites, but for which I now prefer the name Nematophy- ton. When in Lon- don, in 1870, I obtained permission to examine cer- tain specimens of spore-cases or seeds from the Upper Ludlow (Silurian) formation of England, and which had been described by Sir'Joseph Hooker under the name Pachytheca. In the same slabs with these I found fragments of fossil wood identical with those of the Gaspe plant. Still later I recognised similar fragments aasociated also with Pachytheca in the Silu- rian of Cape Bon Ami, !N"ew Bninswick. Lastly, Dr. Hicks has discovered similar wood, and also similar. Fio. 1.—Protamnulana EarTcneam (Niohol- Bon), a probable Bbkocarp of the Ordo- vician 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 Dawson, John William, Sir, 1820-1899. New York, D. Appleton and Company
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