Grier: Fossil Plants of Pittsburgh Coal. 127 



17. Neuropteris fimbriata Lcsquereux. X 117a, X 1246, X 156. 



18. Neuropteris tenuifolia Brogniart. X 118. 



19. Neuropteris scheuchzeri Hoffman. X 119, X 124c, X 125c, X 



126c, X 128, X 129, X 130, X 131, X 132, X 133, X 135, X 

 136, X 137, X 138, X 139. X 140, X 141. X 142, X 162b. 

 This species, described by Lesquereux as N. hirsnta and N. hirsuta 



var. angustifolia, was the most commonly preserved form in the 



horizon. 



20. Neuropteris clarksoni Lesquereux. X 120. 



CORDAITALES. 



Genus CoRDAiTES Unger, 1850. 



21. Cordaites communis Lesquereux. X 121, X 1530, X 159, X 



162a. 



22. Cordaites diversifolius Lesquereux. (?) X 122, X 163c. 



23. Cordaites borassifolius Unger. X 123, X 134, X 154, X 163&. 

 Next to Neuropteris scheuchzeri this species seemed to be the 



commonest in the horizon examined. 



24. Cordaites grandifolius Lesquereux. X 1240. 



25. Cordaites validus Lesquereux. (?) X 125a. 



Genus Rhabdocarpus Goeppert and Berger. 



26. Rhabdocarpus (Pachytestus) mansfieldi Lesquereux. X 126a. 



INCERT^ SEDIS. 



27. Radicites Potonie = Pinnularia Lindley and Button. X 127. 



Of the species listed in this paper, the following have already been 

 described as occurring in the Lower Coal Measures of Missouri by 

 Lesquereux,^ Hambach^ and White,' viz: Hysterites cordaites, Callip- 

 teridium membranaceum, Neuropteris missouriensis, Sphenophyllum 

 fasciculatum, Sphenophyllum lescurianum, Cordaites communis, Pecop- 

 teris vestita, Neuropteris Scheuchzeri, Pecopteris arborescens, Calamites 

 suckotci, Cordaites diversifolius. Of these, all but the last five have 

 hitherto been regarded as being peculiar to that horizon. 



1 Second GeoL Surv. Pa., Report of Progress, "P," VoL III, 1884, p. 879, 880. 



2 BulL Geol. Sur. Missouri, No. i, 1890, p. 83-85. 



^ Mon. 37, U. S. GeoL Sur., "Fossil Flora Lower Coal Measures of Missouri," 



p. 284. 



