. The geological history of plants [microform]. Paleobotany; Paléobotanique. LAURENTIAN AND EARLY PALEOZOIC. 29 ClimacticJiniteSy from the same beds which afford Pro- ticlinites. The principal difference between Protichnites and their modern representatives is that the latter have two lateral furrows produced by the sides of the cara- pace, which are wanting in the for- mer. I subsequently applied the same explanation to sev- eral other ancient forms now known under the gener- al name Bilobites (Figs. 6 and 7).* The tubercu- lated impressions known as Phyma- toderma and Caul- erpites may, as Z
. The geological history of plants [microform]. Paleobotany; Paléobotanique. LAURENTIAN AND EARLY PALEOZOIC. 29 ClimacticJiniteSy from the same beds which afford Pro- ticlinites. The principal difference between Protichnites and their modern representatives is that the latter have two lateral furrows produced by the sides of the cara- pace, which are wanting in the for- mer. I subsequently applied the same explanation to sev- eral other ancient forms now known under the gener- al name Bilobites (Figs. 6 and 7).* The tubercu- lated impressions known as Phyma- toderma and Caul- erpites may, as Zeil- Yiq. n,—Rmnphym% {Rusichmtes) Ormvillen- ler has shown, be **X ^^ ammal burrow of the Siluro-Cam- , , ,, , brian, probably of a crustacean, a, Track made by the bur- connected with it. rowing of the mole- cricket, and fine examples occurring in the Clinton forma- tion of Canada are probably the work of Crustacea. It is probable, however, that some of the later forms referred to these genera are really Algae related to Caulerpa, or even branches of Conifers of the genus Brachyphyllum. Nereites and Planulitcs are tracks and burrows of worms, wif . or without marks of setae, and some of the. * The name Bilobiies was originally proposed by Do Kay for a bivalve shell {Conocardium). Its application to supposed Algfc was an error, but this is of the less consequence, as these are not true plants but only animal 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, J. W. (John William), Sir, 1820-1899. New York : D. Appleton
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleobo, bookyear1888
