INDEX. 311 



Sphseroccus, habitat of the genus, i. 239 



Sphaerophorei, characters of the, i. 310 



Sphseroplea annulina, structure and reproduction of, i. 208, 209 



Sphagnei, characters of, i. 331 



Sphagnum latifolium, leaves of, i. 330 



Sphagnum, or common bog-moss, structure, fructification, and habitat of, 



" i. 332 



uses of, in Lapland, i. 334 



Spikenard, amount of radiant heat absorbed by the perfume of, i. 44 

 Spinal cord, structure and functions of the, ii. 8 

 Spines of plants, structure and formation of, i. 411 

 Spirogyra, mode of reproduction of. i. 218 

 Spirulina tenuissima, motions of, i. 213 

 Splachnei, characters of the tribe, i. 330 

 Splachnum ampullaceum, structure and habitat of, i. 331 

 Splachnum vasculosum, structure and colour of, i. 330 

 Spondylus gsedaropus, eyes of the, ii. 235 

 Sponges, iodine found in, i. 19 

 Sponges, the Carpentaria a link between the foraminifera and the, ii. 57 



structure and development of, ii. 57 



varieties in size, structure, and habits of the marine sponges, ii. 60 



propagation of, ii. 60, 61 



structure of fresh-water sponges, ii. 61 



fossil sponges, ii. 62 

 Spongilla fluviatilis, structure and development, and propagation of, 



ii. 61 



Spongiocarpeae, structure and mode of propagation of, i. 237, 238 

 Spores of Cryptogamia, i. 177, 178 

 Sporidia, or spore-bearing cells, of Ascomycetes, i. 290 

 Sporidiiferi, structure and fructification of, i. 260 



orders of, i. 260, 261 

 Sporiferi, structure and fructification of, i. 260 



orders of, i. 260 



Sporopodium Leprieurii, ascus of, i. 300 

 Spurgeworts, poisons and food supplied by the, i. 425, 426 

 Squamarise, structure and modes of propagation of, i. 237 

 Squid, structure of the, ii. 245, 246 

 Squilla Desmarestii, structure of, ii. 198 

 Squilla mantis, structure of, ii. 198 

 Stamens of flowering plants, i. 379 

 Starch, production of, by plants, i. 420 

 Star-fishes, structure of, ii. 169 



