328 



GENERAL INDEX 



Pycnidiospores, and oidia, 286 



„ diploidisation by, 286 



Pyrenomycetes, and conjugate nuclei, 

 188, 289-291 

 „ nuclei in ascogenous 



hyphae, 269 

 „ social organisation in, 



172-177 

 Pyronema confluens, sexual process of, 

 290, 291-292 



Rate of fall of spores, 47-48 



Rate of growth of hyphae, 91, 199, 223 



Rate of movement of nuclei, 213-229, 



303-304 

 Rea, Carleton, and Coprinus pihsiis, 75 

 Reduction divisions, of nuclei in my- 

 celium, 252 

 „ „ of nucleus in a 



basidium, 272 

 Rhizina undulata, ascogonia of, 290 

 Roots, union of, in Douglas Fir, 140, 



141 

 Rudiments of fniit-bodies, 101, 102-112 

 Rust fungi, 281-287 



Saprohgnia ferax, no social organisation 



in, 152 

 Schizophyllum commune, heterothaUic, 



171 

 „ „ kinds of spores, 



270 

 Segregation of sex-factors, 272-274 

 Septa, destruction of, during diploidi- 

 sation process, 216, 227-228 

 „ in young myceUa, 80, 81 

 Sex, and hyphal fusions m Hymeno- 

 mycetes, 184-186 

 ,, change to diploid phase in homo- 



thaUic species, 186 

 „ compatibility, 204 

 „ criteria of, 198-203 

 Sex-factor analysis of a mycelium, 234- 



237, 250-252 

 Sex -factors, number of, and symbols for, 

 203-204, 269-270 

 „ segregation of, 188, 272 



Sexual organs, absence of, 281, 287 

 Seyfert, R., on clamp-connexions ia Smut 



fungi, 287 

 Smut fungi, 287-288 

 Social organisation, general account, 139- 

 186 



Social organisation, in animals and 



plants, 139 

 ,, „ of Ascomycetes, 172- 



178 

 „ ,, of Coprinus sterqui- 



linus, 152-169 

 „ „ of other Hymeno- 



mycetes, 169-172 

 Sordaria fimiseda, hyphal fusions, 172 

 Species, persistence of, and social or- 

 ganisation, 168 

 Specific gravity of spores, 48, 55 

 Spore-deposit, how collected, 194 



„ of Coprinus plicatilis, 55 



Spore -discharge, from a single basidium, 

 53 

 hastening of, 31 

 in Coprinus curtu^, 28- 



32 

 in C. plicatilis, 51-55 

 mode of demonstrating, 



31 

 zone of, 50 

 Spore-like cells, of Mycetozoa, 151-152 



,, ,, illustration of, 151 



Spores, always haploid, 270 



„ and bacteria, 85-89, 90, 91 

 and Coprinus ink, 69-70, 72 

 ,, and heat, 6, 89 

 ,, and horses, 5, 38, 80-85 

 ,, germination of, 78-91 

 ,, many, in a dung-ball, 163-169 

 ,, not easily destroyed, 72 

 ,, number per unit area of hy- 



menium, 63-65 

 „ of Coprinus lagopus, four kinds, 



194-195 

 ,, one in a dung-ball, 160-163 

 ,, per xmit volume of fruit-body, 67 

 ,, photographed dry, 80 

 „ rate of fall of, 47^8 

 ,, sexual kinds of, in heterothaUic 



Hymenomycetes, 270 

 ,, shape of, in various Coprini, 21, 



46-47 

 „ sown in unsterUised dung, 81-85 

 ,, specific gravity of, 48, 55 

 ,, trajectories of, 30 



variability of, 39, 47^8 

 Sprout-conidia, 288-289 

 Sterigma, and drop-excretion, 31-32, 



54 

 Sterile fruit-bodies, and fumes of fresh 



manure, 9 

 Sterility, of certain mycelia, 167, 193 



