INDEX. 



Abies excelsa, fecundation of, 418. 



Abietineee, anatropal ovules of, 400 ; 

 nucleus in, 400 ; corpuscula of, 

 410. 



Abnormal fruit in mosses, Gumbel's 

 observatious on, 180. 



Adiantum, antheridia of, 187 ; germi- 

 nation of, 183. 



Adventitious roots, 203 ; of Isoetes, 

 336. 



Adventitious shoots of abortive pro- 

 thallia of ferns, 197. 



Agardb, observations on the germina- 

 tion of Equisetacese, 304. 



Air-cavities of Marchautiese, 111. 



Air-cavities of antheridial discs in 

 Marchantia polymorpha, 121 ; of 

 receptacle of do., 117. 



Alicularia, antheridia of, 65. 



Alicularla scalaris, arrangement of 

 cells in leaves of, 63 ; cell-multipli- 

 cation in apex of stem of, 442 

 development of fruit of, 74, 77, 78 

 development of perianth in, 69 

 germination of, 54 ; ramification of 

 prothallium of, 84. 



Allosurus, abortive prothallia of, 197. 



Alternation of generations in mosses 

 and ferns, 434. 



Amoeboid movements of primordial 

 utricle of spore-mother-cells in 

 Phascum cuspidatum, 163. 



Analogy of the prothallium and frond 

 of ferns, to the leafy plant and fruit 

 of mosses, 435. 



Aneura, archegonia of, 44 ; cell- 

 development in stem of, 43 ; growth 

 of stem in, 43 ; ramification of, 

 44. 



Aneura nmltifida, 21 ; elaters of, 86 ; 

 spermatozoids of, 87. 



Aneura pinguis, 21 ; development of 

 antheridia of, 45. 



Anther of Pinus, 401. 



Antheridia of Aneura pinguis, 45 ; of 

 Anthoceros, 7 ; of Botrychium Lu- 

 naria, 308 ; of Equisetacese, 293 ; 

 observed by Thuret and Milde, 306; 

 of ferns, 185 ; discovered by Nageli, 

 258 ; of Fossombronia pusilla, 65 ; 

 of Jungermannise, 87 ; of Junger- 

 mannia, Lopbocolea, Radula, Mado- 

 theca, Alicularia, Erullania, Fossom- 

 bronia, Haplomitrium, 65 ; of 

 Liverworts, Gottsche's views on, 

 erroneous, 88 ; oiLophocolea biden- 

 tata, rarity of, 72 ; of Lophocolea hete- 

 rophylla, Radula complanata,Junger- 

 mannia divaricata, and Frullania 

 dilatata, 73 ; of Madotheca platy- 

 phylla, 65, 67 ; of Marchantia poly- 

 morpha, 120 ; of Metzgeria furcata, 

 43 ; of mosses, 152 ; Hedwig on, 

 175 ; of Ophioglossum, Mettenius on, 

 316 ; of Pellia epiphylla, 29 ; great 

 number of in Pellia epiphylla, 31 ; 

 of Rebouillia hemispherica, 122 ; of 

 Riccia glauca, 93, 94 ; of Riella, 

 99; of Sphagnum, 154; observa- 

 tions on, in Sphagnum, by Schleiden, 

 155, 177; and by Schimper and 

 Unger, 177. 



Antheridia, production of, on adven- 

 titious shoots of the prothallium of 

 ferns, 197. 



Anthoceros, early growth of, 1, 3 ; 

 reference to figures of, and observa- 

 tions on, by Bischoff, Nees vou 

 Esenbeck, and Schacht, 19. 



Archegonia of Aneura, 44 ; of Antho- 

 ceros, 9 ; of Archidium, 149 ; of 

 Archidium phascoides, 152; olBotry- 



