INDEX 



647 



operculum, 13, 165, T 8o, 207, 209, 210, 



211, 213, 216, 217, 218, 220 

 Ophiodcrma (see Ophioglossum 



pendulum), 245 



Ophioglossacese, 229, 280, 284, 300, 

 303, 308, 440, 580, 581, 582, 601, 

 602 



gametophyte, 234 



germination of spores, 234, 235 

 Ophioglossales, 233, 234 

 Ophioglossites antiqua, 582 

 Ophioglossum, 4, 232, 233, 235, 240, 

 241, 259, 261, 262, 266, 270, 272, 

 278, 284, 286, 290, 295, 300, 301, 

 302, 339, 482, 554, 557, 560, 574, 

 582, 598, 599, 600, 60 1, 602 



antheridium, 236 



archegonium, 237, 238 



leaf, 250, 251 



root, 252, 253, 254 



sex-organs, 236 



sporangium, 247, 254, 255, 256 



sporophyte, 245 



stem-apex, 247, 248 



stem-structure, 249 



vascular bundle, 245, 247, 250 

 Bergianum, 258 

 Lusitanicum, 247 

 palmatum, 258, 303 

 pedunculosum, 234, 238, 245; Fig. 



125 



embryo, 245 



prothallinm, 236 



(Ophioglossum) pendulum, 234, 235, 

 238, 250, 254, 257, 258, 271, 303, 

 600; Figs. 124, 125, 131, 133, 134, 

 135, 136, 137, 138, 139, 140 



prothallium, 235 

 simplex, 258, 301, 580, 600 

 oeocenum, 582 

 vulgatum, 249, 250, 254, 257, 271 ; 



Fig. 132 



leaf, 257 

 Oscillaria, 128 



Osmunda, 5, 259, 304, 343, 346, 348, 

 362, 367, 376, 448, 583, 597 



antheridia, 351, 352 



archegonium, 353, 354 



chromatophores, 597 



embryo, 357 



fertilization, 356 



germination of spores, 347 



primary root, 359 



spermatozoids, 353 

 Osmundaceae, 304, 306, 310, 311, 346, 

 439, 440, 570, 580, 584, 602, 603 



gametophyte, 346 



leaf, 361, 362 



root, 362 



sporangium, 365 



stem, 359 



stem-structure, 360, 361 

 (Osmunda) cinnamomea, 348, 349, 

 35i, 362, 363, 364; Figs. 177, 192, 

 193, 195, 197, 198, 199, 200, 205, 

 207 

 claytoniana, 272, 348, 349, 363, 364 ; 



Figs. 191, 193, 194, 195, 196, 198, 



200, 20 1, 202, 203, 205, 207 

 regalis, 346, 348, 349, 350, 363; 



Figs. 203, 204, 206 

 Ostrich fern, 312 

 ovule, 7, 560, 603 



Palaeopteris (see Archaeopteris), 579 



Palaeozoic seed-plants, 604 



Palaeozoic formations, 578 



paleae, 292, 335 



palisade parenchyma, 291, 528 



Pallavicinia, 14, 87, 89, 125 



cylindrica, 89, 90; Figs. 41, 42 



decipiens, 98 



Lyalii, 98 



paraphyses, 11, 199, 345, 392, 489 

 parasitism, 533 



sporophyte, 229 

 Parkeriaceae, 310, 392 

 parthenogenesis, 574 

 peat-bogs, 160 

 peat-mosses, 166 

 Pellia, 9, 19, 73, 99, 108, 109, 148, 155, 



158, 183, 595 

 antheridium, 92 

 centrospheres, 99 

 spermatozoids, 17, 92 



Bolanderi; Figs. 54, 55 



calycina, 88, 90, 99; Figs. 40, 48 



epiphylla, 17, 90, 98, 99, 146, 318, 



