68o 



STUDIES IN FOSSIL BOTANY 



Sigillariostrobus , 232-237 

 heterospory, 233-234 

 ciliatus, *234 

 Crepini, 233, 235 

 nobilis, 232 

 rhombibracteatus, *234 

 Tieghemi, 232 

 Silesia, 157 

 Silicic acid, 9 

 Silicified specimens, 10 

 Silurian formation, 6 

 Simplices, 352 

 Smedley, H. E., 387 

 Solenostele, 442 



Solms-Laubach, Graf H. zu, 3, 10, 

 59, 71, 72, 108, no, 157, 444, 

 477. 479. 494. 495. 49^, 53 2 . 

 53 6 . 5 6 °- 5 6 3. 5 6 4- 5 6 5> 579. 

 599, 628, 638 

 Sorus of Dicksonia, 467 

 South, F. W., and Compton, R. H., 



366, 598 

 Spencerites, 189-193, 201, 266, 633, 

 636 

 axis, 191 

 sporangia, 190 

 spores, 191, 192 

 sporophylls, 189 

 insignis, 189, *I90, 233 



spores, *i86 

 maptsculus, 192 

 Spermatozoids, 458, 459, 544. 545 

 Spermophyta, 471, 614, 617 

 affinities, 643-661 

 origin, 653 

 Sphenophyllales, 68, 86, 123, 615, 

 616, 617, 628, 632, 641 

 affinities, 619-626 

 Sphenophylleae, 86-114 

 Sphenophyllostachys, 108 

 Sphenopkyllum, 86-114, ^87, 619, 

 623, 626, 628 

 fructifications, 99-113 

 habit, 86, 624 

 leaves, 87, 97, 98 

 roots, 98 

 stem, 89-97 



cuneifoliu?n, 88, 99, 104, 107 

 Dawsoni, 99, 100, *ioi, *io2, 

 io3,*io4,*io6, 107, 109,113, 

 121, 620 

 axis, 100, 103 

 bracts, 100, 105 

 sporangia, 101, 106 

 sporangiophores, 102, 105 



Sphenopkyllum Dawsoni, spores, 106, 

 107 



emarginatum, 622 



fertile, 111-112, *ii2, 131, 621, 

 622 



insigne, *95, 97, 98, 115 



majus, 112-114, *ii3, 622, 630 



myriophyllum, 94, 100, 620 



plurifoliatum, 89, *gi, *92, *93 r 

 94, 96, 97, 98, 100 



quadrifidum, *90 



speciosum, 88 



trichomatosum, 113 

 Sphenopsida, 616, 617 



affinities, 619-632, 633 

 Sphenopterideae, 422, 471, 472 

 Sphenopteris , 272, 273, 274, 284, 292, 

 355- 377. 378, 4<>3. 422, 648 



dissecta, 418 



Dubuissonis, 395 



elegans, 415, *4i6, *4i7, 418 



Honinghausi, 373, 384, 385, 394, 



395 

 Linkii, 418 

 Spkenozamites , 493 

 Spines of Lyginodendron, 368, 369, 



377 

 Sporangia and spores of Archaeo- 

 catamites, 6i, 70 

 of Asterotheca, 279, *28o 



Botryopteris, 330, *33i, 332, 



*333 

 Calamostackys, 53-57, *50, *5i, 



*54. *SS, *5& 

 Cheirostrobus, *n6, *H7, 120, 



121 

 Cingularia, *&9 

 Corynepteris , 323 

 Cyathotrackus , 279 

 Dactylotkeca, *28o, 284 

 Diplolabis, 324 

 Ferns, 275-276, *28o 

 Grand'Murya, 281 

 Hawlea, *28o, 281 

 Hyme?iopkyllites, 290 

 Oligocarpia, *28o, 290 

 Palaeostachya, *6i, 62, 64, *65, 



*66 

 Pteridotheca, "292, ""293, 294 

 Ptyckocarpus, 277, *278 

 Renaultia, *28o, 284 

 Scolecopteris, 282, *283 

 Senftenbergia, *28o, 287 

 Spencerites, * 186, * 190, 191, 



192 



