1919] BASSLER—SPORANGIOPHORIC LEPIDOPHYTE 107 



PLATE X 



Fig. 13. — Section of stem of Sigillaria menardi Brongt. much enlarged 

 (Brongniart: Archives d'Mus. d'Hist. Nat. 1:1839. pl- 25. fig. 4). 



Fig. 14. — Calamites {Asteromyelon) Augustodunense Renault (Renault: 

 Autun et Epinac. 1893. pi. ^6. fig. 6). 



Figs. 15, 16. — Cantheliophorus ensifer, n.sp.; Pottsville Formation, 

 SwaUow FaUs, Md. (CoU. Md. Geol. Survey). 



Figs. 17, 18. — Cantheliophorus sp.; Lower Carboniferous, Greenland 

 (Nathorst: Groenlands Nord-oestkyst 191 1. pi. 16. figs. 34, 55). 



Figs. 19-21. — C. Waldenbergensis (Potonie); Waldenberg Series, Silesia 

 (Nath. Nachtr. Pal. Fl. Spitzbergen 1914. fig. 16, p. 64). 



Figs. 22-24.— C/ mirabilis (Nath.); Lower Carboniferous Spitzbergen 

 (Nath. 1914, loc. cit. pi. 13, figs. 30, 28, 26); X2. 



Figs. 25, 26. — C. robustus, n.sp.; Allegheny Formation, Westernport, Md.; 

 part of sporangium in place on fig. 25. (X2) (Coll. Md. Geol. Survey). 



Fig. 27. — C. pugiatus, n.sp.; Pottsville Formation, Campbells Ledge, 

 Pittston, Pa. (Lacoe Coll. U.S.N.M. no. 16108). 



Fig. 28. — C. sicatus, n.sp.; Allegheny Formation, above Schell, W.Va. 

 (Coll. Md. Geol. Survey). 



Figs. 29, 30. — C novaculatus, n.sp.; Allegheny Formation, Franklin, 

 W.Va.; fig. 29 with attached sporangium ■ partly cut away to expose the 

 sporangiophore beneath; both figs. X2 (Coll. Md. Geol. Survey). 



Fig. 31. — Same species. Allegheny Formation, Luke, Md. (Coll. Md. 

 Geol. Survey). 



Fig. 32. — Lepidodendron sp. (to be described later) ; Allegheny Formation, 

 Barrelville, Md.; suspected of being the impression of the stem of the tree 

 which bore C. novaculalus. 



Fig. 2)2)- — Calamostachys Decaisnei Renault (Rech. sur Veget. Silicifies. 

 ]Mem. Soc. Eduenne 1878. pi. 4. fig. 12). 



PLATE XI 



Fig. 34. — Diagrammatic sketch of Cow/Ae//o/>/wrM5; a, toe; Z*, heel; c, keel; 

 J, sporophyll pedicel; e, blade; /, inner or axillary field; g, outer field; /;, brace; 

 i, crest; k, guard; /, beak; w, angle of inflexion, blade to pedicel; n, angle of 

 inchnation, guard to pedicel; 0, sporangium; p, point of inflexion; q, wing of 

 pedicel. 



Fig. 35. — Same, seen from above. 



Fig. 36. — Diagrammatic cross-section (tangential) through sporangia 

 borne by single sporangiophore of Calamostachys Decaisnei Renault, showing 

 relation of sterile tissue (black) to sporogenous tissue. 



Fig. 37. — Similar section for Cantheliophorus. 



Fig. 38. — Same for Lepidostrobus. 



