. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. an<l Coal Flora of Pa., p. 8:J:J. Coal MeiiM. neuropteroidea, (tntbier, , Vernt. Stein Sachs., p. 23, and Coal KSora of Pa., p. , Coal Meaa. obli<iua, Bunbury, 1847, Quar. .Jour. Geo. Soc, vol. :«, p. 4'.'7, and (?oal Flora of Pa., p. 146, Coal Meas. rubella, Leaque- reux, 1870, Geo. Sur. III., vol. 4, p. .388, Coal Meas. Hcheuchziri, H cff-l man, in Roem. [ PHanz. d. Koh- lengeb. am llarz' in Paleo
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. an<l Coal Flora of Pa., p. 8:J:J. Coal MeiiM. neuropteroidea, (tntbier, , Vernt. Stein Sachs., p. 23, and Coal KSora of Pa., p. , Coal Meaa. obli<iua, Bunbury, 1847, Quar. .Jour. Geo. Soc, vol. :«, p. 4'.'7, and (?oal Flora of Pa., p. 146, Coal Meas. rubella, Leaque- reux, 1870, Geo. Sur. III., vol. 4, p. .388, Coal Meas. Hcheuchziri, H cff-l man, in Roem. [ PHanz. d. Koh- lengeb. am llarz' in Paleont. IX, p. •''o-:« 186, and Coil ""'"l"* Flora of Pa., p. 832, Coal Meas. DiDYMoi'HVM,UM, (j(L'ppert, 1841, Gatt. der FosB. Pflanzen, p. 35. [Ety. didymon, double; phyllon, a leaf.] Trunk arborea- ; leaves double, united at the base, disposed in spiral order, appressed; areoles prominent, reni- form, each resembling a pair of small areoles attached to each other. Type D. schottini. oweni, Lesquereux, 1870, (Sigillaria oweni,) Geo. Sur. 111., vol. 4, p. 498, Goal Meas. reniforme, Dawson, 1862, Quar. Jour. Geo. Soc., vol. 18, p. .309, Ham. Gr. Diplazitet emarginatua, see Pecopteria emar- ginata. DiPLosTKoiuM, Corda, 1845, Beitrage zur Flora der Vorwelt, p. 112. [Ety. diplot. double; stege, a covering; but spelled bv Corda Diplotegium.] Thick trunks of trees lonffitudinally furrowed; bark thick, and imbricated in short cylin- drical overlaps. Type D. brownanum. brownanum, Corda, 1845, Beitrage zur Flora der Vorwelt, p. 112, Coal Meas. retusum, Dawson, , Can. Nat., vol. 8, and Acad. Geo!., p. 490, Coal Meas. Iruncatum, Lesquereux, 1860, Geo. Sur. Ark., vol. 2. Syn. for Knorria imbricata. DiacoPHYcus, Walcott, 1879, Trans. Alb. Inst., vol. 10, p. 19. [Ety. di»ko8, disk; phukos, sea-plant.] Frond discoid, slightly convex, and substance coria ceous. Type D. typicale. typicale, Walcott, 1879, Trans. Alb. Inst., vol. 10, p.
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