FEENS— MEGAPHYTON— APHLEBIA. 103 



The inscription of this species of Megaphyton in tlie flora of the lower 

 coals of Missouri rests wholly on the determination of the specimen from 

 Henry County, described and figured by Lesquereux in the Coal Flora.^ 

 Although this specimen appears from its description to differ somewhat 

 from the type established by Weiss, it constitutes for the present the 

 American type, and consequently the standard of characters for the species 

 in this country. 



A small specimen before me, collected by Dr. Jenney, presents a 

 smaller trunk, whose partly effaced and obsure scars may be in agreement 

 with the type referred to above, though the characters are not sufficiently 

 clear to admit of a satisfactory identification. The general facies and pro- 

 portions of the segment are strongly suggestive of the M. approximatmn as 

 illustrated by Lindley and Hutton' and Zeiller.' In fact, but for the 

 obscurity of its characters, which make its accurate identification impos- 

 sible, and the circumstance that the M. Golclenhergi was found in the same 

 vicinity or perhaps at the same locality, I should have compared the speci- 

 men in hand with the species of Lindley and Hutton rather than with that 

 described by Weiss and Schimper. 



Locality. — The type illustrated in the Coal Flora, and donated to the 

 United States National Museum by Dr. J. H. Britts, is from the vicinity of 

 Clinton, Henry County, Missouri, U. S. Nat. Mus., 6198. The small, 

 doubtful fragment is from the Deepwater mine, U. S. Nat. Mus., 6206. 



APHLEBIA Presl, 1838. 



1835. Fucoides Gexmar and Kaulfuss, Acta Acad. 0. L. C. Nat. Cur., vol. xv, 2, p. 230 



(pars). 

 1838. Aphlebia Presl, iu Sternberg: Fl. d. Vorwelt, vol. ii, fasc. 7-8, p. 112. 

 1888. Aphlehia Zeiller, Fl. foss. bassiu Louill. Valenciennes, p. 300. 

 1838. Schizopteris Brongn., Presl, iu Sternberg: Fl. d. Vorwelt, vol. ii, fasc. 7-8, p. Ill 



(pars). 

 1854. Pachyphyllimi Lesquereux, Proc. Boston Soc. N; H., vol. vi, No. 4, p. 421. 

 1858. Pachyphylhm Lesquereux, in H. D. Eogers: Geol. Pennsylvania, vol. ii, p. 863. 

 1869. Bhacophyllum Scliimper, Traite pal. veg., vol. i, p. 684. 



1 Vol. i, p. 349, pi. 1x1, fig. 4. 



2 Fossil Fl. Gr. Brit., vol. ii, pi. osvi. 



» Fl. foss. bassiu houill. Valencienues, p. 310, pi. lii, fig. 1. 



