LYCOPODIALES— LEPIDODENDEE J3— LEPIDOSTROBUS. 2 1 3 



That these cones were very long is indicated by the fact that none of 

 the fragments show the full length, although I have been able to join 

 fragments so as to construct segments over 4() cm. in lengtli without 

 including both extremities. The base of the cone is slightly narrowed, then 

 abruptly rounded. The upper part tapers somewhat, then rounds very 

 obtusely to a relatively small, acuminate apex. The specimens before me 

 differ only by the slightly narrower and shorter bracts frona a number of 

 specimens from Mazon Creek, Illinois, identified by Professor Lesquereux 

 as Lepidostrohus princeps? The bracts in one specimen are, however, a little 

 longer in proportion to the width of the base than in the specimens from 

 Duquoin, Illinois, figui-ed in the Coal Flora, while the whole width of our 

 cones, as well as those from j\Iazon Creek, is rather greater than that 

 indicated in the original figure. 



It is quite uncertain as to what arboreal species Lepidostrohus princeps 

 was joined. Were it not for the description by Lesquereux" of a quite 

 different cone as the fruit of SigiUaria camptotcenia Wood (S. monostigma Lx.) 

 we might be justified in inquiring as to whether one was not the cone of the 

 other. In those cones from Mazon Creek, in which the bracts had been 

 removed from the slightly compressed sporangiophores, the serried ends of 

 the latter are more than a little suggestive of LepidopiMoios. Lepidostro- 

 hus princeps is very near to certain American material recorded as L. 

 Goldenhergii Schimp.^ It differs, however, by the greater width of the cones, 

 the longer, more slender, acuminate bracts, and the narrower axis. L. prcr- 

 longus Lx. has the bracts much smaller and narrower, while the cones are 

 more slender, though nearly as long. The bracts and sporangiophores of 

 L. latus are much more slender. 



iocrtKfes.— Gilkerson's Ford, U. S. Nat. Mus., 6057, 6071; Hobbs's 

 coal bank, U. S. Nat. Mus., 6286. 



Lepidostrobus sp. 



A small cone about 5 cm. long and 18 mm. wide, having slender, taper- 

 ing, acute bracts, with fine distinct median nerves, comes from Pitcher's 



' Kept. Geol. Surv. Hlinois, vol. ii, 1866, p. 455, pi. xIt, ligs. 1-4. 

 2 Coal Flora, vol. iii, 1884, p. 793. 



^ Schimper, Traits, vol. ii, p. 61, pi. Ixi. Brongniart, Hist. viSg. foss., vol. ii, pi. xxiv, fig. 6 

 (non pi. xxiii, iigs. 4, 5). 



