678 



STUDIES IN FOSSIL BOTANY 



Ptychocarpus unitus, 277 

 Ptychopteris, 295, 296 

 Ptychoxylon, 487, 489, 529 



Levyi, 487, *488, 488-494 

 Purbeck beds, 610 



Lower, 556, 557 



strata, 5 



Rachiopteris aspera, 375 



corrugata. See Zygopteris corrugata 

 cylindrica, 333, 335 

 hirsuta. See Botryopteris hirsuta 

 insignis. See Zygopteris corrugata 

 ratnosa. See Botryopteris ramosa 

 Williamsoni, 447 

 Radicle, 574 

 Radiospermic, 651 

 Radstock, 532 



Ramenta, 318, 566, ^569, 571, 572 

 Ranunculaceae, 659 

 Ranunculi^ 88 

 Receptacle in Bennettiteae, 567, '568, 



*S69. 57*> 581, 582, 588, 593 

 Renault, B. , 10, 11, 42, 43, 59, 60, 

 62, 63, 70, 71, 72, 8o, 81, 82, 89, 

 90, 97, 98, 188, 202, 216, 218, 

 221, 223, 224, 230, 257, 282, 

 286, 289, 297, 313, 319, 321, 

 325, 326, 331, 334, 343, 422, 



437. 439. 44i» 44$. 457. 45 8 > 

 459, 460, 469, 486, 487, 490, 

 493- 494. 5 OI » 502, 505, 506, 

 509,510, 513, 519, 526, 527, 530, 

 536, 537. 538. 539. 54L 542. 544. 

 545, 548, 549, 550, 606, 639, 640, 

 651, 652, 654 



Renaultia, Stur (see Sturiella, Weiss), 

 286 



Renaultia, Zeiller, *28o, 284, 285 



Replum, 458 



Rhabdocarpus, 451, 508, 512, 548, 



55L. 651 



subtunicatus , *5i3 

 Rkacopteris, 289 

 Rhaetic formation, 83, 350, 351, 494, 



593, 607, 609, 610 

 Rhizocarps, 353 

 Rhizophore, 244, 262 

 Roof nodules, 12, 13 

 Root, 639, 649 



apex, 381 



Archaeocalamites , 45, 72 



Botryopteris, 327, 328 



Calamarieae, 41-46 



Catamites 1 41-46 



Root, Calamodendron, 45 



Cordaiteae, 530, *53i 



Heterangium, 410-41 1 



Lepidodendron. See Stigmaria 



Lyginodendron, 378 - 383, *379* 

 *382 



Medullosa, 439-440, 510 



Poroxylon, 509, 510 



Psaronius, 298, 299, 301, 302 



Sigillaria. See Stigmaria 



Sphenopkyllum, 98 



Stigmaria, 205-206, 237-262 



Tubicaulis, 335 



Zygopteris, 314, 318 

 Rudolf, K., 304 



Saarbriicken, 204 

 St. Helen's, 239 

 Salvinia, 261 

 Samaropsis, 467 

 Sandstone, Calciferous, 94, 96 

 New Red, 5 

 Old Red, 290 

 Sapindaceae, 443, 548, 549 

 Saporta and Marion, 595 

 Sarcopteris Bertrandi, 291 

 Sarcotesta, 456" 464, 512, 547 

 Scalariform vessels, 642 

 Scales, interseminal, 568, 569, 570, 



572. 575. 576, 582 

 Sckizaea, 611 



Schizaeaceae, 287, 288, 292, 342/350 

 Schizodendron—Tylodendron, 605 

 Schizolepis, 609 

 Schizoneura, 83, 84 

 Schizopteris pinnaia, 322 

 Schizostachys frondosus, 322 

 Sclerotesta, 453, 457, 464, 513, 



548 

 Scolecopteris , 282, 284, 287, 288, 



289, 303, 348, 421 

 elegans, 282, 283 

 polymorpha, 282, ^283 

 Seam nodules, 12 

 Secondary thickening in Artkroden* 



dron, 34 

 in Calamarieae, 80 



Catamites, 28, 36 

 roots, 42 



Calamodendron, 34 



Cheirostrobus, 121 



Lepidodendron, 134, 140, i43 f 



151. 154 

 Psaronius roots, 303 

 Sigillaria, 216, 218, 219, 226 



