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36 8 BITUMINOUS FAMILY. First Subspecies. Bituminous Wood or Fibrous Brown Coal. Bituminoses Holz, Werner. Vegetabile fossile bituminosum, Wall. t. ii. p. 41.5.—Bituminoses Holz, M'td. s. 631. Id. Wern. Pabst. b. i. s. S6'.5.—Carbo nated Wood, Kirm. vol. ii. p. 60.—Bituminoses Holz, Es trier, b. iii. s. 166. Id. Emm. b. ii. s. 54.—Le Bois bitumineux commun ou parfait, Brock, t, ii. p. 44—Bituminoses Holz, Eeuss, b. iii. s. 146.—Holzige Braunkohle, End b. i. s. 186. Id. Suck. 2 ter th. s. 60.—Bituminoses Holz, Bert. s. 351. Id. Molts, b. ii. s. 311.—Lignite fibreux, Brong. t. ii. p. 32. Bituminoses Holz, Leonhard, Tabel. s. 43.—Holzige Aftcr- kohle, Hans. s. 116—Fasrige Braunkohle, Karsten, Tabel. s. 59-—Bituminoses Holz, Lenz, b. ii. s. 1057. External Characters. Its colours are pale and dark blackish brown, clove- $ brown, wood-brown, hair-brown, and yellowish-brown. Its external shape resembles exactly that of stems and branches of trees, but is usually compressed. Its principal fracture is glimmering, sometimes ap proaching to glistening: the cross fracture is shining. The first is lighter coloured than the second. The fracture is fibrous in the small, slaty in the great, and corresponds with the woody texture : the cross frac ture in some varieties is imperfect conchoidal. The fragments are splintery, or cuneiform, but seldom indeterminately angular. ' # ' I ° It is opaque. The streak is shining. It
