ART. — AST.] 



PLANTS. 



107 



ersi,) Quar. Jour. Geo. Soc, vol. 19, p. 

 463, and Coal Flora of Pa., pp. 307, 776, 

 Catskill Gr. 

 sphenophyllifolia Lesquereux, 1884, Coal 



Flora of Pa., p. 775, Catskill Gr. 

 stricta, Andrews, 1875, Ohio Pal. vol. 2, 

 p. 418, Coal Meas. 



Aristophycus, Miller 

 and Dyer, 1878, 

 Cont. to Pal. 

 No. 2, p. 3. 

 Probably inor- 

 ganic, and, if 

 fucoidal, too ir- 

 regular and too 

 little known to 

 be retained as a 

 genus. 

 ramosum, Miller 

 and Dyer, 1878, 

 Cont. to Pal. 

 No. 2, p. 4. Hud. 

 Riv. Gr. Prob- 

 ably inorganic. 

 ramosum var germanum, Miller and Dyer, 

 1878, Cont. to Pal. No. 2, p. 4, Hud. 

 Riv. Gr. Probably inorganic. 

 Arthraria, Billings, 1874, 

 Pal. Foss., vol. 2, p. 66. 

 [Ety. arthron, a joint.] 

 Cylindrical stems with an 

 expansion at each end in 

 the form of a dumb-bell. 

 Type A. antiquata. 

 antiquata, Billings, 18 74, 

 Pal. Foss., vol. 2, p. 66, 

 Upper Taconic. 

 biclavata, S. A. Miller, 1875, Cin. Quar. 

 Jour. Sci., vol. 2, p. 354, Hud. Riv. Gr. 

 Arthrophycus, Hall, 1852, Pal. N. Y., vol. 

 2, p. 4. [Ety. arlhron, joint; phykos, sea- 

 plant.] Simple or branching, rounded 

 or subangular, flexuous, transversely 

 ridged or furrowed. Type A. harlani. 



Fig, 



10.— Archseopteris 

 stricta. 



Fig. 12. — Arthrophycus harlani. 



harlani, Conrad, 1838, (Fucoides harlani,) 

 Ann. Rep. N. Y., p. 113, and Pal. N. Y., 

 vol. 2, p. 5, Medina sandstone. 



montalto, Simpson, 1888, Diet, 

 found in Pa. Medina (?) Gr. 

 Arthrostigma, Dawson, 1871, Foss. 

 Canada, p. 41. [Ety. arthron 



Foss., 



Plants 

 joint; 



stigma, a dot or puncture.] Stems 

 elongated, cylindrical, bifurcating, and 

 giving off lateral branches ; irregularly 

 furrowed longitudinally, with circular 

 leaf scars arranged in whorls, and bear- 

 ing linear rigid leaves with circular 

 bases, structure apparently cellular, 

 with a slender vascular axis. Type A. 

 gracile. 



gracile, Dawson, 1871, Foss. Plants Can., 

 p. 41, Devonian. 

 Artisia, Sternberg, syn. for Sternbergia. 



transversa, see Sternbergia transversa. 

 Asolanus, Wood, 1860, syn. for Sigillaria. 



camptotsenia, syn. for Sigillaria monostigma. 



manephleus; a doubtful species of Sigil- 

 laria. 



ornithicnoides.see Sigillaria ornithicnoides. 

 Asplenites, Gceppert, 1836, Systema Filicum 

 Fossilium. [Ety. Asplenium, a genus of 

 ferns.] 



elegans, see Eremopteris elegans. 



ruber, Lesquereux, 1858, Geo. Sur. Pa., 

 vol. 2, p. 864, Coal Meas. This species 

 does not seem to be recognized by 

 Lesquereux in his later work. 

 Asterocarpus, Gceppert, 1836, Syst. Fil. 

 Foss., p. 188. [Ety. aster, star ; karpos, 

 fruit.] Fructification on lanceolate pin- 

 nules, marked by large star-like sori. 

 Type A. sternbergi. 



grandis, Lesquereux, 1870, Geo. Sur. 111., 

 vol. 4, p. 469, Coal Meas. 



sternbergi, Gceppert, 1836, Syst. Filic. 

 Foss., p. 188, Coal Meas. 



Fig. 13.— Asterophycus Simplex. 



Asterophycus, Lesquereux, 1876, 7th Ann. 

 Rep. Geol. Sur. Ind., p. 139. [Ety. 

 aster, star; phykos, a sea- weed.] Stem 

 short, cylindrical; frond expanded and 

 divided star-like from the top of the 

 central axis ; segments flattened or in- 

 flated. Type A. coxi. 

 coxi, Lesquereux, 1876, 7th Ann. Rep. 

 Geol. Sur. Ind., p. 139, Low. and Up. 

 Coal Meas. 

 simplex, Lesquereux, 1880, Coal Flora of 

 Pa., p. 13, Coal Meas. 



Asterophyllites. Brongniart, 1822, Mem. 

 du Mus. t. 8, p, 203. [Ety. aster, star ; 



