Maryland Geological Survey 341 



not seen, but ranging from 11 cm. to over 14 cm., obtuse or subacute at 

 tip, usually somewhat narrowed toward the base, and at the base rather 

 abruptly rounded off into a short pedicel; nerves strong, quite remote, 

 forking at or near the base, and then parallel to near the tip, where they 

 converge and connive more or less." — Fontaine, 1890, 



With the added amplification that the pedicel is somewhat variable in 

 length, this species readily includes those forms named P. pedicellatus 

 by Fontaine, which are otherwise identical with the type material. 



This is the commonest species of Podozamites in the Potomac Group, 

 where it is confined, however, to the earliest formation, the Patuxent. 

 It is not uncommon at Fredericksburg, but most of the specimens are 

 fragmentary, as might be expected in leaves of this size preserved in 

 rather coarse deposits. In life this must have been a very handsome 

 species, and it appears to be quite distinct from any that have been 

 hitherto described. Professor Fontaine has recorded this species from 

 Cape Lisburne, Alaska, but it does not occur there." Possibly Podozam- 

 ites nervosa Newberry (non-Schimper) , described from the Kootanie of 

 Montana, should be referred to this species, but in the absence of the 

 base this cannot be demonstrated with certainty. 



Occurrence. — Patuxent Formation. Fredericksburg, Potomac Eun, 

 Dutch Gap (?), Virginia; 16th Street, District of Columbia. 



Collection. — U. S. National Museum. 



Podozamites langeolatus (L. & H.) F. Braun 

 Plate LIII, Figs. 5, 6 



Zamia lanceolata Lindley and Hutton, 1836, Foss. Fl., vol. iii, pi. cxciii. 

 Zamites lanceolatus F. Braun, 1840, Verzeich. Kreis.-Nat.-Samml. Bayreuth 



Petrefact., p. 100. 

 Podozamites lanceolatus F. Braun, 1843, in Miinster, Beitr. Petrefacten- 



kunde. Band ii, pt. vi; p. 33. 

 Podozamites proximans Conrad, 1869, Amer. Jour. Sci. (ii), vol. xlvii, p. 



361, tf. 

 Podozamites lanceolatus Schimper, 1870, Pal. Veget., tome ii, p. 160. 



^Knowlton, in Collier, Bull. U. S. Geol. Survey, No. 278, 1906, p. 29. 



