PRE-CARBONIFEROUS PLANTS. 



91 



T\g. ICl. Cordailen Robhii,—VaTt of a leaf with shellg of Rpirorbis ; 161a aad b, shelU 

 enlarged. 



162. Cordaites Robbii, — Leaf folded and crunhcd. 



163. Cordaitei augmtifolia, — Leaves in shale, lG3a, portion enlarged; 163b, bases of 



leaves attached to stenj; 166c, leaf showing venation. * 

 164. Broad variety or species ; 164a, portion enlarged showing venatioa. 



165. Corrfa ;<««,— lG5a, portion enlarged, showing venation. 



166. Cylindrical roots of Psilophyton, passing hori/ontally through a bed 



166a. Cylindrical roots passing vertically. 



Pl/ATg XV. Cyclopteris, ife. 



Fig. 167. Ci/clopterix {ArehvopterU) Jaeksoni, — 167a, terminal pinnule showing venatioa. 

 167b, lateral pinnules. Perry, Maine. 



168. Pinna- of the same, Gaspe. j^.. . , 



169. Pinnae of the same, Montrose, Pennsylvania. ,, .^ 



170. Pinnule ^rcA*op<em //o//jan(i. ,, • . . 



171. Pinnnle' Archnpopteris Itoffem. 



172. Cyclopteris Brownii. . .-. - .■ . . 

 1 73 and 1 74. Cyclopteri»( Nephropt/'fiii) problemafica. 



175. SphenopUrn Hilr.hcoekiana, — This species may probably be founded on fortila 

 pinnm of Cyclopteris Jaeksoni ; 166 1 pinnules enlarged. -v .- 



Fig. 



r'i^-'V "^'^ 



Platb XVI. Spkenopkris, Hymenophyllitet, 4y. 



176 and 177. Sphenoptentt Harttii; 177a, portion enlarged. 



178. and 179. llymenophyllitfs curtilobus ; 179a, portion enlarged. 



180. //y»t€nqpAyWj<e«»ttA7/Mrcfl<u»; 180a, portion enlarged. 



181. Hymmophyllites IFUdreti ; 181a, portion enlarged. - - • ■ ■ ■ - 



182. //j/7n«no/(Ai/Z/tfe» (rerarfor^i; 182a, portion enlarged. 



183. Ilymenophylliteg obtusilobus. ' !* ■ ''^ [ .' ' '■ 



184. iSjuAfraopterw mar^moto; 184a, portion enlarged. 



185. Sphenopteris Uoeninghaitsi. ' " . >. 



186. Sphenoptrris tplendens ; 186a, portion enlarged. 



187. Cyclopterii (AneimilM) Boc/cshii; 187a, pinnule, showing veins. 



188. Vyclopteri» (Aneimiteg) obtu*a; 188a, pinnule, showing reina. 



189. Calliplerii pilosa; 189a, Pinna enlarged, showing hairy surface; 189b, fertile 

 pinna enlarged; 189c, pinnule showing venation, enlarged ; 1891 

 fertile pinnule enlarged. 



190. Cyclopteris (Aneimileii) valida, pinnule nat. size. (See Acad. Geol. Fig. 192.) 



Plate xvii. A'europterit, ^r. 



191. Seuropt^ri* (Megalopteris) Dawioni,—\0\a,yenAt\oa. 



192. Portion of a large pinnule split at the margin. 



193. Portion of a pinnule, apex. 



194. Two small pinnules. 



195 and 196. I'ecopterit denaifolia ; 196a, pinnule enlarged. 



197. Neuropteris relorquata; 197a, pinnule enlarged. 



198. Nenropterit Sehoyni ; 198a, pinnule showing veinB. 



199. Neuropteris ; 199a, pinnule showing veins. 



200. Nenropterit eratia ; 200a, venation. 



201 and 202. Cyclopterii (Neuropterit) varia, 202a, venation. 



PliATB xvill. Neuropteri* and AUtlmplMi. 

 Pig. 203. Alethopterit discrepant,— liroAi variety. 



Fig. 



-4 



