Xll 



CONTENTS. 



SECTION 

 XVII. 



XVIII. 



XIX. 

 XX. 



XXI. 



XXII. 



XXIII. 



XXIV. 



XXV. 



XXVI. 



XXVII. 



XXVIII. 



XXIX. 



PAGE 



Dissemination of acrogenously formed spores. Abscision. Abjection. 

 Disappearance of the sporifcrous structure ...... 



Endogenous spore-formation : 



{<n Sporangia of Phycomycetes 



(/>) Asci 



Dissemination of endogenously formed spores : 



(a) Phycomycetes ......... 



(b) Ascogenetic spores. Ejection. Mechanical arrangement for 

 ejection of spores. Simultaneous and successive ejection. Mechanism 

 of simultaneous ejection 



ruffing in Discomycetes 



Peculiar mode of ejection in Pyrenomycetes 



Force of ejection 



Reported peculiarities in Lichen-fungi 



Successive ejection from asci 



Solution and swelling of asci 



Maturation of ascospores after ejection 



Combinations of different kinds of spore-development ; sporidesms 



68 



73 

 76 



81 



84 

 89 



9i 

 9i 

 93 

 93 

 96 



97 

 98 



II. Structure of ripe Spores. 



XXX. Spore-membrane. Exosporium, episporium, endosporium. Germ- 

 pores. Gelatinous envelopes and appendages. — Protoplasm, nucleus, 

 content. — Swarm-spores 



99 



III. Germination of Spores. 



XXXI. Tube-germination and sprout-germination. — Germ-tube, 

 of the mycelium. Promycelium and sporidia . 

 Historical remarks on Chapter III 



Primordium 



109 



US 



DIVISION II. COURSE OF DEVELOPMENT OF FUNGI. 



CHAPTER IV. Introduction. 



XXXII. General course of development in Algae, Mosses, Ferns, and Phanero- 

 gams. Homologies and affinities. Form-genera and form-species 

 in Fungi. Tulasne's pleomorphy. Gradual recognition of the 

 course of development and of the homologies in Fungi. Main or 

 Ascomycetous and other series 1 19 



XXXIII. Closer consideration of the course of development of the higher 

 plants. Archicarp; fructification. — Spore, sporocarp, sporophyte. — 

 Sexual and asexual segment of the development. Homology of a 

 member of the development independent of its sexual function. 

 Interruption and restoration of the homologies. — Alternation of 

 generations. — Homology interrupted and not restored . . . 121 



XXX IV. Agreement of the course of development of the Fungi with that of 

 plants which are not Fungi. Meaning of pleomorphy. Misunder- 

 standings and the way to remove them 126 



