GTMNOSPEEMS— COEDAITALES— OORDAITBS. 261 



The distinction between the leaves desciibed as Cordaites communis 

 and certain forms referred to other species, such, for instance, as the leaves 

 from Cannelton recorded as C. horassifoUus (Stb.) Ung., is not clear to me. 

 From C. lingiilatus Gr. 'Ey., the leaves of which are somewhat similar, C. 

 communis differs by the greater distance of the prominent nerves in most 

 portions of the leaf and by the less rounded apices. 



Localities. — Deepwater mine, U. S. Nat. Mus. ; Pitcher's coal bank, 

 U. S. Nat. Mus., 5418, 5702; Gilkersou's Ford, a small fragment, U. S. 

 Nat. Mus., 6282 ; also a specimen of doubtful specific identity from Jordan's 

 coal bank, U. S. Nat. Mus., 6281. 



Cordaites diveesifolius Lx.! 



1870. Cordaites angustifoUus Lesquereux (non Dawson), Rept. Geol. Surv. Illinois, 

 vol. iv, p. 420 (pars?). 



1878. Cordaites diversifoUus Lesquereux, Proc. Amer. Phil. See, vol. xvii, p. 320, pi. 



xlviii, figs. 3, 3ft (pars). 



1879. Cordaites diversifoUus Lesquereux, Coal Flora, Atlas, pi. Ixxvii, figs. 3, 3«; text, 



vol. ii (1880), p. 535 (pars). 



There are among the ironstone nodiiles from Gilkerson's Ford a few 

 fragments of doubtful specific relations which I should hardly venture to 

 refer to this species but for the facts that it is recorded^ from the same 

 vicinity by Professor Lesquereux, and that such characters as are shown by 

 the specimens in hand appear to agree with matei'ial labeled under the same 

 name by the author of the species. It should be noted, however, that the 

 specimens assigned at various times by Lesquereux to G. diversifoUus are 

 not all of one species, since some of the fragments may belong to Dorycor- 

 daites, while others from Arkansas are apparently specifically inseparable 

 from the material from the Boston mine near Pittston, Pennsylvania, labeled 

 as C. horassifoUus (Stb.) Ung. My identification of the specimens in the 

 ironstone is both temporary and questionable. The fragments before me 

 are nearer the Borycordaites group, and may, in conformity with the views 

 expressed by Grand 'Eury, belong to the Samaropsis type of fruit. It is 

 quite possible that the leaf fragments in hand may have been borne on the 

 same tree with the Cardiocarpus {Samaropsis') Branneri Fairch. and D. W., 

 to be described further on. 



Locality. — Gilkerson's Ford. 



' Coal Flora, vol. ii, p. 536. 



