RHA.] 



PLANTS. 



137 



welt, and Coal Flora of Pa., p. 581, Coal 



Meas. 

 cornutus, Lesquereux, 1880, Coal Flora of 



Pa., p. 583, Coal Meas. 

 costatus, Newberry, 1873, Ohio Pal., vol. 



1, p. 378, Coal Meas., syn. ? for R. 

 acuminatus. 



danai, Foster, 1854, Ann. of Sci., vol. 1, 

 p. 129, and Ohio Pal., vol. 1, p. 376, 

 Coal Meas. 



emarginatus, Lesquereux, 1884, Coal Flora 

 of Pa., p. 818, Coal Meas. 



howardi, Lesquereux, 1880, Coal Flora of 

 Pa., p. 575, Coal Meas. 



inflatus, Lesquereux, 1884, Coal Flora of 

 Pa., p. 815, Coal Meas. 



insignis, Dawson, 1863, Can. Nat. and 

 Geo., vol. 8, and Acad. Geol., p. 478, 

 Coal Meas. 



insignis, Lesquereux, 1880, Coal Flora of 

 Pa., p. 575. The name being preoccu- 

 pied, it has been called R. lescurianus. 



jacksonensis, Lesquereux, 1866, (Carpo- 

 lithes jacksonensis,) Geo. Sur. 111., vol. 



2, p. 461, Low. Coal Meas. 



leevis, Newberry, 1873, Ohio Pal., vol. 1, 

 p. 377, Coal Meas. 



laticostatus, Lesquereux, 1884, Coal Flora 

 of Pa., p. 815, Coal Meas. 



lescurianus, S. A. Miller, 1883, 2d. Ed. 

 Am. Pal. Foss., p. 256, Coal Meas. Pro- 

 posed instead of R. insiynis, Lesquereux, 

 which was preoccupied. 



mammillatus, Lesquereux, 1870, Geo. Sur. 

 111., vol. 4, p. 461, Coal Meas. 



minutus, Lesquereux, 1860, Geo. Sur. 

 Ark., vol. 2, p. 313, Coal Meas. 



multistriatus, Presl, 1833, (Carpolithes 

 multistriatus,) in Steruberg's Flor. d. 

 Vorw., vol. 2, p. 208, and Coal Flora of 

 Pa., p. 578, Coal Meas. 



oblongus, Fontaine & White, 1880, Perm, 

 or Up. Garb. Flora, p. 98, Coal Meas. or 

 Permian. 



pachytesta, Lesquereux, 1884, Coal Flora 

 of Pa., p. 816, Coal Meas. 



platiruargtnatus, Lesquereux, 1860, (Car- 

 polithes platimarginatus,) Geo. Sur. 

 Ark., vol. 2, p. 312, Low. Coal Meas. 



subglobosus, Lesquereux, 1884, Coal Flora 

 of Pa., p. 817, Coal Meas. 



tenax, Lesquereux, 1884, Coal Flora of 

 Pa. p, 818, Coal Meas. 



venosus, Sternberg, as identified by Les- 

 quereux, 1858, Geo. Sur. Pa., vol. 2, p. 

 870, Coal Meas. Not noticed in Coal 

 Flora of Pa., and probably not Amer- 

 ican. 



RHACHIOPTERIS, Dawson, 1862, Quar. Jour. 

 Geo. Soc., vol. 18, p. 323. [Ety. rachis, a 

 stalk; pteris, fern.] Detached leaf-stalks 

 of ferns ; stipes half an inch wide or 

 less ; unevenly striate, giving off op- 

 posite branches, which are abruptly 

 broken off at short distances from the 

 stipe. Type R. pinnata. 



affinis, Lesquereux, 1870, (Stigrnarioides 

 affinis,) Geo. Sur. III., vol. 4, p. 455, 

 Coal. Meas. 



cyclopteroides, Dawson, 1862, Quar. Jour. 



323, Catskill Gr. 

 gigantea, Dawson, 1871, Foss. Plants Can., 



Geo. Soc., vol. 18, p. 323, Catskill Gr. 



., 1871, 

 p. 57, Ham. Gr. 



palmata, Dawson, 1871, Foss. Plants of 

 Canada, p. 57, Ham. Gr. 



pinnata, Dawson, 1862, Quar. Jour. Geo. 

 Soc., vol. 18, p. 323, Catskill Gr. 



punctata, Dawson, 1862, Quar. Jour. Geo. 

 Soc., vol. 18, p. 323, Catskill Gr. 



selago, Lesquereux, 1870, (Stigmarioides 

 selago,) Geo. Sur. 111., vol. 4, p. 456, Coal 

 Meas. 



squamosa, Lesquereux, 1884, Coal Flora 

 of Pa., p. 838, Coal Meas. 



striata, Dawson, 1862, Quar. Jour. Geo. 

 Soc., vol. 18, p. 323, Chemung Gr. 



tenuistriata, Dawson, 1862, Quar. Jour. 



Geo. Soc., vol. 18, p. 323, Ham. Gr. 

 RHACOPHYLLUM, Schimper, 1869, Palseontol- 

 ogie Vegetale, vol. 1, p. 684. [Ety. rakos, 

 rugged; phyllon, leal.] Fronds either 

 flabelliform, many times subdivided or 

 pinnate, irregularly pinnatifid, bipin- 

 natifid; rachis flat, often much dilated, 

 scarcely thicker than the foliaceous lam- 

 ina, which is very variable in the size 

 and the mode of its divisions; veins nu- 

 merous, more or less indistinct, follow- 

 ing the rachis in parallel bundles, di- 

 chotomous in the foliaceous divisions. 

 Type, R. flabellatum. 



adnascens, Lindley & Hutton, 1835, (Schiz- 

 opteris adnascens,1 Foss. Flora, vol. 2, 

 p. 57, and Coal Flora of Pa., p. 321, Coal 

 Meas. 



affine, Lesquereux, 1858, (Pachyphyllum 

 affine,) Geo. Sur. Pa., vol. 2, p. 863", Coal 

 Meas. 



arborescens, Lesquereux, 1870, (Hymen- 

 ophyllites arborescens,) Geo. Sur. 111., 

 vol. 4, p. 415, Coal Meas. 



browni, Dawson, 1861, (Cyclopteris 

 browni,) Quar. Jour. Geo, Soc., vol. 17, 

 p. 32, Portage Gr. 



clarki, Lesquereux, 1866, (Hymenophyl- 

 lites clarki,) Geo. Sur. 111., vol. 2, p. 438, 

 Coal Meas. 



corallinum, Lesquereux, 1880, Coal Flora 

 of Pa., p. 317, Coal Meas. Misspelled 

 corralum in the text. 



cornutum, Lesquereux, 1880, Coal Flora 

 of Pa., p. 317, Coal Meas. 



expansum, Lesquereux, 1880, Coal Flora 

 of Pa., p. 313, Coal Meas. 



filiciforrne, Gutbier, 1842, (Fucoides filici- 

 formis,) Abdr. u. Verst. d. Zwick. 

 Schwarzk. u. sein. Ump., p. 11, and Coal 

 Flora of Pa., p. 316, Coal Meas. 



filiforme, Gutbier, 1842, (Fucoides fili- 

 formis,) Abdr. u. Verst. d. Zwick. 

 Schwarzk. u. sein. Umg., p. 12, and 

 Coal Flora of Pa., p. 838, Coal Meas. 



fimbriatum, Lesquereux, 1858, (Pachy- 

 phyllum fimbriatum,) Geo. Sur. Pa., 

 vol. 2, p. 863, Coal Meas. 



flabellatum, Sternbere, 1833, (Aphlebia 

 flabellata,) Flor. d. Vorw., vol. 2, p. 112, 

 and Coal Flora of Pa., p. 311, Coal Meas. 



