TABLE OF CONTENTS. IX 



PAGE 



Haplomitrium Hookeri, 85 ; Hedwig's determination of the structure 

 of the archegonia of Jungermanniae, 85, 86 ; fruit of Jungermanniae 

 observed by Gottsche, Schniidel, and Hedwig, 86 ; development of 

 their spores observed by H. von Mold, 86 ; membrane of the elater 

 seen by Schmidel in Aneura multifield, 86 ; Gottsche's observa- 

 tions on the elaters and perianth of Jungermanniae, 87 ; Schmidel's 

 discovery of self-motile bodies in the antheridia of Fossombronia 

 pusilla, 87 ; figures and descriptions of antheridia and spermatozoids 

 of Jungermanniaj given by various authors, 87 ; Gottsche's observa- 

 tions on the antheridia of Haplomitrium Hookeri, 88. 



CHAPTER IV. 



RICCIA AND RIELLA 89 



The germ-plant of Riccia glauca and the arrangement and multiplication of 

 its cells, 89 ; vegetation of Riccia glauca, 90 93 ; its leaves, 92 ; de- 

 velopment of its organs of fructification, 93 97; antheridia, 94; 

 archegonia, 96 96 ; development and maturation of the fruit, 96 ; 

 production of gemma? in Riccia glauca, 97.; Lindenberg's observa- 

 tions on Riccia, 97; Riella, 97; peculiar habit of Riella {Duriena) heli- 

 coplylla, 98 ; germ-plants of Riella Reuteri, 98 ; vegetation of Riella 

 Reuteri, 98, 99 ; development of its leaves, 99 ; succession of its 

 shoots, 99 ; development of antheridia and archegonia in Riella 

 Reuteri, 99, 100; impregnation and development of its fruit and 

 spores, 100, 101. 



CHAPTER V. 



MARCHANTIEAE AND TARGION1E.E .... 1Q2 



{Marchantia polymorphs, Fegatella conica, Rebouillia hemispherica, 

 Lunularia vulgaris, Targionia hypophylla.) 



Vegetation of the above plants, 102112; formation of each new shoot 

 by the amalgamation of three shoots, 102 ; development of rudiments 

 of spring shoots of Fegatella conica in the preceding October, 102, 

 note ; mode of growth of the shoots of Marchantieae and Targioniece, 

 103 104 ; their ramification, 104 ; formation of buds or bulbils in 

 Lunularia and Marchantia, ]04 107; vegetation of the buds, 107, 

 108 ; second mode of production of shoots in Lunularia, Mar- 

 chantia, Targionia, Rebouillia, and Fegatella, 108, 109 ; structure 

 and development of the leaves of Marchantieae, 109, 110 ; stomata 

 and air-cavities of Marchantieae, 110, 111 ; inflorescence of Mar- 

 chantieae, 111 114; development of the fructiferous shoot, 112 ; in 

 Rebouillia hemispherica, 112, 113 ; receptacles, 113 ; those of Rebou- 

 illia hemispherica producing usually only four archegonia, 113 ; produc- 

 tion of archegonia in Marchantieae, 113 ; condition of the tissues of 

 the receptacle in the neighbourhood of impregnated archegonia, 113, 

 114; growth of the young fruit of Rebouillia, 114; archegonia of 

 Fegatella conica, 114, 115 ; archegonia of Marchantia polymorpha, 

 115, 116; air-cavities of the receptacle of Marchantia polymarpha, 



