THE FLORA OF THE COAL PERIOD IN THE UNITED STATES. 



348 



do to the true Sigillarise. There are no ribs, and the scars have the peculiar form and the 

 absence of vascular scars which belong to the genus Syringodendron. 



Syn. S. bistriatum, Wood. Proc. A. N. S., vol. xii, 1860, p. 521. 

 Cabinet of the Academy. Locality unknown. 



S. magnificum, Wood. Proc. A. N. S., vol. xii, 18(50, is probably a form of Sigillaria 

 catenulata. Lindley and Hutton. 



Solenoula rsiLOPHLyEUS, Wood. Proc. A. N. S., vol. xii, p. 238. Prof. Lesquereux 

 tells me that he considers this fossil as probably a decorticated specimen of Syringodendron 

 cyclostigrrw, Brongt. I do not see how the two can be joined except by finding the speci- 

 mens which present in different portions, the very different characters of each. The 

 figure given (pi. 4, Pig. 3, vol. xii, Proc. A. N. S.), is characteristic. 



Gen. Lepidodendron, Sternb. 



L. Oweni, Wood. Proc. A. N. S., vol. xii, I860, p. 239. This species is closely re- 

 lated to L. vestitum, Lesq., but is probably distinct. The figure given of it (pi. 5, Pig. 1, 

 Proc. A. N. S., vol. xii), is a good one, representing every character on the stone. I 

 think I was mistaken in referring L. aculeatum, Sternb., of Owen's Geological Survey of 

 Wisconsin, to this species. 



L. URiEUM, Wood. Scars elliptical, somewhat rhomboidal, elongate and curved below 

 and above, marked with transverse flexuous wrinkles; margin slightly raised; vascular 

 scar subrhomboidal or subtriangular (in the one case having the basal angle pronounced, 

 in the other the base: merely convex with the remaining angle mostly obtuse), situated 

 a little above the centre of the leaf-scar, impressed with three dots arranged in a curve 

 near its base, the inner of which is linear and transverse; median line not very distinct 

 but running the whole length of the scar, — above the vascular scar, smooth and furnished 

 with a triangular expansion rivalling the vascular scar in size ; below the vascular scar, 

 crossed by many very heavy, transverse, flexuous wrinkles ; appendages distinct, irregularly 

 curved and of considerable length ; tubercles oval, elongate, situated immediately below 

 the vascular scar and close to the median line. 



L. urarum, Wood. Proc. A. N. S., vol. xii, 1800, p. 520. 



The total length of the leaf-scar, in our type, is 2§ inches ; from the lower end to the 



