86 FOSSIL PLANTS FROM ALABAMA. 



16. Sphenophyllum tenerrimum Ett. 



Two specimens; Museum number, 2074. 



17. Neuropteris Elrodi Lx. Plate xxix, ii^s. 1—3. 



In the U. S. Coal Flora, p. 107, I remarked on this species that it 

 might be a variety of V. Smithii Lx., and also (/. c.) tbat it is closely 

 related to X. Duloschi Star., Culm Flora, PI. xi, Fig. 9. In Vol. in 

 of the same work (U. S. Coal Flora, p. 735), I remarked again of the 

 elose affinity of N. Elrodi and N. Smithii, considering them as two dif- 

 ferent species, the first with oblong, larger, obtuse or obtusely pointed 

 pinnules, the terminal long-lanceolate, acuminate, or blunt at apex, as iu 

 PL xxix, figs. 1-3; the second with pinnules very small, nearly round, 

 the terminal shorter and always obtuse, as in PL xxix, fig. 4. At the 

 same time I recognized (p. 730), the identity of X. elrodi with X. Duloschi. 

 The figures of PL xxix, figs. 1-4, from specimens of Mr. I. C. Russell's 

 collection, where the two forms are represented in many fragments, 

 show the differences in their characters. It is certain that if the two 

 forms ear sometimes found upon the same specimens they are always 

 upon different stems or never attached to the same rachis. I may 

 remark, also, that the finest specimens of JT. Smithsii were communi- 

 cated to me from the Coal Measures of Alabama by Prof. Eug. A. 

 Smith, and later by Prof. William M. Fontaine, from West Virginia, 

 and that the specimens from which the species of X. Elrodi was first 

 described were sent years after from the Whetstone quarries of the 

 Chester group of Indiana, and that in none of these specimens the two 

 forms are observed. X. Schlearii Stur. has priority on X. elrodi. 



Twenty-five specimens; Museum number, 2075. 



IS. Neuropteris Smithii Lx., Plate xxix, fig. 4. 

 Six specimens; Museum number, 2070. 



19. Rachophyllum adnascens L. & H. 



One specimen; Museum number, 2G77. 



20. Calymmotheca Linkii Stur. 



Four specimens, Museum number, 2078. 



21. Cordaites validus Lx. 



One specimen;. Museum number, 2058. 



22. Trigonocarpus ampullaeformis Lx. 



One specimen, Museum number, 2079. 



23. Rhabdocarpus multistriatus Sterubg. 

 One specimen ; Museum number, 2080. 



24. Rhabdocarpus Russellii, n. sp. Plate xxix, fig. 10. 



Fruit large, ovate in the middle, enlarged truncate (or broken) at base, 

 nucleus oblong, gradually narrowed upward in passing to a narrow 

 tubular appendage, distinct to the apex, outer testa forming a fiat bor- 

 der continued upward, enlarged toward the apex; thinly closely striate 

 as well as the surface of the nucleus, truncate at apex. 



