November 17th, 1873. Geological Section. 
President Newberry in the chair. Eight persons present. 
Among the books received, was the Journal of the 
Linnean Society of London, Botany, vol. xiii, Nos. 68 to 72 
inclusive, in regard to which the President called particular 
attention to the importance and interest of Mr. Bentham’s 
paper on the Composite. 
He also exhibited a suite of specimens of Celacanthus 
elegans, Newb., from the coal measures at Linton, Ohio, and 
after briefly referring to their structure and geological posi- 
tion,* read portions of the paper of Mr. Cope, in the Proceed- 
ings of the Academy of Natural Sciences of Philadelphia, 
part 2, March to September, 1873, in which that gentleman 
describes the new genera Conchiopsis and Peplorhina. Of these, 
the former, at least, is founded simply upon some imperfect 
specimens of Ceelacanthus elegans. He had engaged Mr. Cope 
to describe, for the final report of the Ohio Survey, the 
new amphibians discovered in the Linton coal-bed ; for which 
work his skill and famiharity in that department of zodlogy 
render him eminently fit, On the slabs containing the 
amphibian remains, occurred some specimens of the Cela- 
canthus ; and upon these Mr. Cope founds his new genera, 
although he had been notified that the fossil fishes of Ohio, 
were all either already described, or now in his (the speaker's) 
hands for determination. He could speak with certainty upon 
these points, as over five hundred specimens of this fish had 
passed under his examination, exhibiting every variety and all 
the parts ; and there is no question that Mr. Cope’s Conchiopsis 
is the same genus as Clacanthus of Agassiz; that two of his 
species, C. filiferus and C. anguliferus, are founded on Cee. 
elegans (described in Proc. Acad. Nat. Sci., Phil., April, 1856, 
and in the final report of the Ohio Survey, vol. I, part 2, 
Palxontology; page 837, plate 40); and that his third species, 
C. exanthematicus, is identical with his Peplorhina anthracina, 
* Cf. these Proceedings, May 26th, 1873. 
