300 Notices respecting Ncxo Books. 



ance, and these glands remaining i'orm twin tubercles, close 

 together in the upper part of the .sUiii, but in the lower part 

 distant, although the cicatrices appear to have been nearer 

 together in the longitudinal direction. There is also a small 

 dot on the cicatrix between the two glands, which is but super- 

 ficial, and does not appear on the woody part of the stem. 



Pith slender, passes up one side of the trunk. 



Found in the greatest part of the coal-formations of Europe : 

 either in immense masses incumbent on the coal, or in a ver- 

 tical position, in which position its lower extremity frequently 

 rests on the thin shale which covers the coal. 



Observations. — The specimen from which the drawing was 

 made is now in the possession of the Rev. Samuel Sharp, 

 vicar of Wakefield, who procured it from a sandstone quarry 

 near Altofts in Yorkshire, the property of Sir Edward Dods- 

 worth, who has also one of the same species in his garden, 

 where it forms one side of the entrance to a grotto. 



In one of the abandoned chambers of the upper El-se-car 

 coal mine, seven trunks of this plant were suspended freely 

 from the roof; some of them projected a foot, and the largest 

 measured eight feet in circumference. 



The specimen figured is nine feet long, five feet in circum- 

 ference at the lower extremity, and only one foot nine inches 

 at the upper. 



The first figure represents a sketch of the whole trunk, and 

 shows also the situation of the pith. The second figure re- 

 presents a portion of the upper part, of the natural size, in 

 which is shown the different appearance of the bark and un- 

 barked surface. The third figure shows a portion of the 

 lower extremity in which the deep concave fuiTow, the flat- 

 tened ridge, the twin glands placed at a greater distance apart 

 in the horizontal direction, but much nearer in the longitudi- 

 nal, are exhibited. 



Aphyllum. Stem arboi-escent, covered with fleshy scales, 

 inserted in hollows furnished with glands. 



cristatum. Scales obovate, with an oblong crest in their 

 centre ; interstices forming angular furrows. — Found in a sand- 

 stone quarry at Banktop, Yorkshire. 



asperum. Stem tapering ; scales long, rhomboidal, those 

 in the lower part of the stem separated by a considerable in- 

 terstice resembling bark. — Found imbedded obliquely in shale, 

 near a rent in the strata, in a continuation of the El-se-car 

 nine feet coal, situated near Hoyland in Yorkshire. 

 ^ Lychnophorites, Martius. — Stem branched, covered with 

 tubercles; tubercles leiii-he'Avmg; leaves navvoyf. 



superus. Tubercles terminating obtusely at top ; cicatrix 



quadiau- 



