INDEX. 



347 



Saxicolous species, 103, 104, 110, 124, 142, 247, 304. 



Sender's classification, 28, 117, 119. 



Scriptures, Lichen-dyes probably alluded to in the, 85. 



"Scripture-worts," 245. 



" Scrottyie " of Shetland, 199. 



Scurvy, use in, 158. 



Scutellate apothecium, 61, 181, 276. 



Scyphi, 264. 



Seasons, effects on growth of thallus, 55. 

 Secondary and tertiary thallus, 37. 



Septa of medullary filaments, 39, 45 ; of paraphyses, 65, 113 ; of spores, 147, 



167, 244, 246, 282, 302. 

 Sessile apothecia, 62. 



Sexuality of Lichens, speculations regarding, 25 . 

 Shetlanders, use of Lichen-dyes by the, 199, 225. 

 " Shield-edge Lichens," 214. 

 Silica in the thallus, 52. 



Siliceous soils, Lichens growing on (vide Arenaceous). 



Snow-line, Lichens growing at or near the, 100. 



Social Lichens, 273. 



Soil-producers, Lichens as, 4, 78, 235. 



Sodium, chloride of, in maritime species, 137. 



Soredia, 41, 140, 187, 196, 297. 



Sorediiferous degeneration of apothecia, 297 ; of thallus, 57, 140, 147, 148, 



151, 187, 196, 197, 201, 216, 217, 223, 237, 297. 

 Sowerby's ' English Botany,' 29, 122. 



Species, characters of British, 121 ; numerical distribution of, 99. 

 Specific virtues, reputed, in medicine, 83. 



Spermatia, affinity to antherozoids, 73 ; escape from spermogone, 75 ; form, 

 73, 167, 316 ; development, 73 ; functions, 75 ; movements, 73, 275 ; 

 reaction of iodine on, 113. 



