1886.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 87 



Comparable to Cardioearpus longicollte Lx., but smaller, less enlarged 

 in the middle, the marginal dug narrower in the lower part, broader in 

 the upper ; surface striate. 

 . One specimen ; Museum number, 2CS1. 



25. Lepidodendron aculeatum Sternbg. 

 One specimen ; Museum number, 2659. 



26. Stigmaria Russellii, n. sp. PI. xxix, fig. 11. 



Part of flattened branch or stem; surface narrowly obscurely striate 

 lengthwise; areoles small, in regular spiral or quincuuxial order, l cm 

 distant, round or oval, without rings but with a slightly prominent cen- 

 tral point. 



Species comparable to Stiqmaria stellaris Lx. (U. S. Coal Flora, p. 510, 

 PL lxxiy, figs. 5, 7), differing by areoles marked with a distinct central 

 vascular scar, the surface smooth or vertically striate. The areoles are 

 a little less than 2 mm iu diameter. Tliere are, on the reverse of the 

 specimen smooth, flat, linear leaves nearly l cm broad, similar to leaves 

 of Stigmaria possibly referable to the species. 



One specimen ; Museum number, 2000. 



27. Poa-cordaites Grand 'Eiiry. 



One specimen ; Museum number, 2082. 



EXPLANATION OF PLATE XXIX. 



Figs. 1-3. Neuropteris Elrodi Lx., p. 92. 



Fig 4. Neuropteris Smithii Lx., p. 92. 



Figs. 5, 5a, 6, 6a, 9, 9a. Sphenopteris Harveyi Lx., p. 90. 



Figs. 7, 8, 8a, 8b. Sphenopteris Harveyi, Lx., var. robusta Lx., p. 91. 



Fig. 10. Rhabdocarpus Russellii, u. sp., p. 92. 



Fig. 11. Stigmaria Russelli, u. sp., p. 93. 



