TABLE OF CONTENTS. 



CHAPTER I. 



PAGE 

 ANTHOCEROS LjEVXS AND PUNCTATUS . . 1 



Vegetation of Anthoceros, 1 7 ; cell-multiplication in the stem of Antho- 

 ceros, 37; chlorophyll bodies, 57; organs of fructification of 

 Anthoceros, 7 18; formation of antheridia in Anthoceros, 79; 

 escape of the antherozoids, 9 ; formation of the archegonia in Antho- 

 ceros, 9 ; their impregnation, 9 ; their development into the fruit, 

 10, 11; cell-development in the young fruit, 11 14; the so-called 

 calyptra, 13; the columella, 13, 14; formation of the spore-mother- 

 cells, 14 17; spores, 17, 18; reproduction of Anthoceros by buds, 

 18; observations of Mohl, Nageli, and Schacht on the development 

 of the spores of Anthoceros, 18, 19; reference to figures of Antho- 

 ceros, 19 ; observations of Nees von Esenbeck, Bischoff, and Schacht 

 on the fructification of Anthoceros, 19. 



CHAPTER II. 



LEAFLESS JUNGERMANNLE . . . .21 



(Pellia epiphjlla, Aneura pin-guis and multifida, Metzgeriu f areata.) 



Structure of the spores of Pellia ejriphylla, 21 ; their germination, 21, 22 ; 

 vegetation of Pellia epiphylla, and cell-multiplication in the stem and 

 shoots, 22 29 ; production of roots, 23, 24 ; formation of hairs, 24 ; 

 production of shoots, 2628 ; production of antheridia, 29, 30, and 

 spermatozoids, 30, 31; production of archegonia, 3134; perianth, 

 33 ; impregnation, 34 ; development of the fruit, 34 39 ; formation 

 of elaters and spore-mother-cells, 38 ; production of spores, 39 41 ; 

 vegetation of Metzgeria /areata, 41 43 ; cell-multiplication in its 

 stem, 41 ; development of shoots in Metzgeria /areata, 41, 42; small 

 size of its chlorophyll-granules, 42; development of adventitious 

 shoots, 42; production of fructiferous leaves or lateral axes, 43; 

 antheridia and archegonia, 43 ; development of stem and shoots in 

 Aneura, 43, 44 ; production of archegonia, 44, 45 ; development of 

 the fruit, 45 ; development of antheridia, 45, 46 ; production of buds 

 by Aneura multifida, 46. 



