104 



PLANTS. 



[ACA. ALE. 



Antholithes, Asterocarpus, Cardiocarpou, Carpolithes, Cordaianthus, Cordaicarpus, 

 Cordaistrobus, Cordaites, Desmiophyllum, Dicranophyllum, Lepidoxylon, Rhab- 

 docarpus, Trigonocarpum. 



FRUIT OF UNCERTAIN AFFINITY. 

 Gulielmites. 



The Coniferse are exogenous evergreen trees and shrubs, with branching trunks 

 containing a resinous juice. They have a strobile cone or solitary seed. Three 

 Palaeozoic genera have been referred to. the Coniferse: viz., Dadoxylon, Saporteea, 

 and Walchia, but there must be doubt about the reference of Dadoxylon to this Class. 



WOOD OF UNCERTAIN AFFINITY. 

 Celluloxylon, Nematoxylon, Ormoxylon, Prototaxites, Sternbergia, Syringoxylon. 



ACANTHOPHYTON, Dawson, 1862, Quar. Jour. 

 Geo. Soc., vol. 18. p. 324. [Ety. akanlha, 

 thorn ; phyton., plant.] Cylindrical 

 branches, ramifying in alternate man- 

 ner, striated, with scattered tubercles, on 

 which are borne short spines. Type A. 

 spinosum. 



spinosum, Dawson, 1862, Quar. Jour. Geo. 



Soc., vol. 18. p. 324, Chemung Gr. 

 ALETHOPTKRIS, Sternberg, 1825, Vers. Darst. 

 Flora der Vorwelt. p. 21. [Ety. alethos, 

 true ; pteris, fern.] Fronds polypinnate ; 

 pinnules coriaceous, simple, mostly en- 

 tire, enlarged at the base, connate or 

 free, borders reflexed ; midrib distinct, 

 immersed into the epidermis, marked 

 by a groove on the upper surface ; 

 prominent on the lower ; lateral veins 

 simple or forking once, open, often in 

 right angle to the rachis ; fructifications 

 marginal. Type A. lonchitica. 



acuta, see Pecopteris acuta. 



ambigua, Lesquereux, 1880, Coal Flora of 

 Pa., p. 182, Coal Meas. 



aquilina, Schlotheim, 1820, (Filicites 

 aquilinus,) Petrefaktenkunde, p. 405, 

 and Coal Flora of Pa., p. 181, Coal Meas. 



bunburyi, Andrews, 1875, Ohio Pal., vol. 

 2, p. 421, Coal Meas. 



coxana, Lesquereux, 1861, Geo. Sur. Kv., 

 vol. 4, p 433, Coal. Meas. 



crassa, Lesquereux, 1884, Coal Flora of 

 Pa., p. 748, Coal Meas. 



crenulata, Brongniart, as identified by 

 Lesquereux, in Geo. Sur. 111., vol. 2, 

 p. 439, is Pseudopecopteris subcrenu- 

 lata. 



cnstata, see Pecopteris cristata. 



discrepans, Dawson, 1862, Jour. Geo. Soc., 

 vol. 18, p. 222, Devonian. 



distam, Lesquereux, 1858, Geo. Sur. Pa., 

 vol. 2, p. 865, is a variety of A. lon- 

 chitica. 



tmarginata, see Pecopteris emarginata. 



erosa, see Pecopteris erosa. 



evansi, Lesquereux, 1884, Coal Flora of 

 Pa., p. 834, Coal Meas. 



falcata, Lesquereux, 1870, Geo. Sur. 111., 

 vol. 4, p. 396, Coal Meas. 



gibsoni, Lesquereux, 1880, Coal Flora of 

 Pa., p. 183, Coal Meas. 



grandifolia, Newberry, 1873, Ohio Pal., 

 vol. 1, p. 384, Coal Meas. 



grandis, Dawson, 1863, Can. Nat. & Geol., 

 vol. 8, and Acad. Geol. p. 484, Coal Meas. 



halli, see Pecopteris halli. 



helense, Lesquereux, 1880, Coal Flora of 

 Pa. p. 179, Coal Meas. 



heterophylla, Lindley & Hutton, 1833, 

 (Pecopteris heterophylla,) Foss. Flora, 

 vol. 1, T>. 113, Coal Meas. 



holdeni, see Protoblechnum holdeni. 



hymenophylloides, see Pseudopecopteris 

 hymenophylloi- 

 des. 



inflata, see Callip- 

 teridium infla- 

 tum. 



ingens, Dawson, 

 868, Acad. Geol. 

 p. 553, Devo- 

 nian. 



Isevis, Lesquereux, 

 1858, Geo. Sur. 

 Pa., vol. 2, p. 865, 

 Coal Meas. 



lanceolata, see Pe- 

 copteris lanceo- 

 lata. 



lonchitica, Schlo- 

 theim, 1820, (Fi- 

 licites lonchiti- 

 cus,) Nachtrage 

 zur Petrefakten- 

 kunde, p. 411, 

 and Coal Flora 

 of Pa., p. 177, 

 Coal Meas. 



tongifolia, see Pe- 

 copteris longi- 

 folia. 



macrophylla, see Danseites Macrophyllus. 



massillionis, see Callipteridium massillo- 

 neum. 



FIG. 5. Aletliopteris 

 lonchitica. 



