. Off-hand sketches : a companion for the tourist and traveller over the Philadelphia, Pottsville, and Reading railroad . palms and other monocotyledons;and, finally, of numerous plants, the exact nature of which is doubt-ful. Of the entire number of species detected in this formation, two-thirds are ferns. The fossils are divided by Botanists into the follow-ing genera, determined by the character of their fronds ; pachypteris,sphenopteris, cyclopteris, glossopteris, neuropteris, odontopteris, anom-opteris, taeaniopteris, pecopteris,louchopteris,clathropteris, schizopteris,otopteris, caulopte
. Off-hand sketches : a companion for the tourist and traveller over the Philadelphia, Pottsville, and Reading railroad . palms and other monocotyledons;and, finally, of numerous plants, the exact nature of which is doubt-ful. Of the entire number of species detected in this formation, two-thirds are ferns. The fossils are divided by Botanists into the follow-ing genera, determined by the character of their fronds ; pachypteris,sphenopteris, cyclopteris, glossopteris, neuropteris, odontopteris, anom-opteris, taeaniopteris, pecopteris,louchopteris,clathropteris, schizopteris,otopteris, caulopteris and sigillaria, etc., the two latter occurring onlyas stems, and the last being considered by many as a dicotyledonousplant. Of these, figure 1 exhibits a specimen of the neuropteris, or FIG. 1.— nerve fern, which are plentifully distributed in the coal. Figure 2 is aBpecimen of the odontopteris, or tooth-fern, not so numerous as theformer, but still characteristic of this formation. The next, Anom-opteris, are seldom met with, but nevertheless flourished in this era. ANTHRACITE COAL FORMATION 125.
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Keywords: ., bookcentury1800, bookdecade1850, bookidoffhandsketc, bookyear1854
