SPHENOPHYLLALES— SPHElJfOPHYLLUM. 177 



Specimens with entire or dissected leaves are frequently found mingled, 

 the dissection often reaching to near the base of the leaves, approaching 

 S. hifmxatam Lx. in appearance, though this latter species, found in the 

 "conglomerate" or "subconglomerate" coals, I have not seen in any 

 material from Missouri. Obscure fragments of cones, ptobably belonging 

 to this species, are found mingled with the specimens of stems and leaves. 



To Splienophyllum cuneifolium doubtless belongs the specimen from 

 Clinton recorded in the Coal Flora^ as S. filicuhne Lx. In this specimen, 

 which was collected by Dr. Britts and was formerly in Professor Lesquereux's 

 private collection, and which is now No. 8679 of the Lacoe collection in 

 the U. S. National Museum, it is clear that the cleavage of the shale has 

 broken away the ends of all except the highest leaves in the verticil, so that 

 the broken edges are all within a single curve, the line of fracture being 

 distinctly oblique to the venation of the leaves. There is no evidence of 

 any inequality in the arrangement of the leaves other than is common in 

 S. cimeifolimn, while, at the same time, there is no pairing of the four outer 

 leaves or separation of the two middle ones. 



The principal characters of the fruit of this species, so well worked out 

 by Professor Zeiller, are stated in the discussion of the genus. 



Localities. — Owen's coal bank, U. S. Nat. Mus., 5454, 5456, 5475?; 

 Pitcher's coal bank, U. S. Nat. Mus., 5455; also found at Gilkerson's Ford. 



Sphenophyllum emarginatum Brongn. 



PI. LIX, Fig. Id. 



1822. SphenopMUites emarginatus Brongniart, Classif. veg. foss., p. 234, jil. ii, flgs. 8, 



Sa-b. 

 1822. Rotularin marsilewfoUa Sternberg, Versucli, vol. i, fasc. 2, p. 33 (pars). 

 1825. Rotularia marsilecefoUa Sternberg, Versucb, vol. i, tent., p. xxxii (pars). 

 1828. Rotularia marsilecefoUa Sternberg, Bronn, in Bischoif : Kryptogam. Gewachse, 



p. 89, pi. xiii, figs. la-b. 

 1838. Rotularia mar sileie folia Sternberg, Presl, Verb. G-esell. Mus. Bobmeu, p. 29, pi. 



ii, figs. 2-4. 

 1828. ISphenophyllum emarginatum' Brongniart, Prodrome, p. 68. 

 1835. Sphenophyllum emarginatum Brongn., Bronn, Letb. Geogn., vol. i, p. 32, jjl. vii, 



fig. 10. 

 1855. Sphenophyllum emarginatum Brongn., G-einitz, Verst. Steinkobl. Sacbsen, p. 12, 



pi. XX, figs. 1-4 (5-7?), (pi. xxxiv, fig. 4 ?). 



'Vol. 1, p. 59. 

 MON XXXVII 12 



