Index. 



287 



Polysiphonia fastigia/a, antheridia of, 



"7- 



apex of, 115. 



asexual reproduction of, 1 16. 

 auxiliary cell of, 117, 118 (Fig. 



21). 

 branches of, 116. 



carpogonium of, 117 (Fig. 21). 

 carpospores of, 119. 



cortex of, 113, 114, 115. 



cystocarp of, 119. 



epiphytic, 113. 



hairs of, 116. 



life-history of, 119, 120. 



medulla of, 113, 114, 115. 

 ova of, 117. 



pigments in, 114. 



procarp of, 117 (Fig. 21). 



protoplasmic connections in, 115. 



respiration of, 116. 



sexual reproduction of, 117. 



sperms of, 117. 



tetraspores of, 116. 



transport in, 116. 



trichogyne of, 117 (Fig. 21). 



Primula " crushed strawberry," 265. 

 Procambial tracts, 185. 250. 

 Procarp, 117 (Fig. 21). 

 Protease in Penicillium, 101. 

 Proteid, 17. 

 Proteins, 16, 28. 



chemical nature of, 16, 17. 



colloidal state of, 19, 28. 



in pyrenoid, 37. 

 Proteolytic enzymes, 28. 

 Protophloem, 186, 189, 219. 

 Protoplasm, appearance of, 6, 7, 17. 



assimilation cf, 31. 



chemical nature of, 16. 



coagulation of, 16, 18, 22. 



constituents of, 16. 



death of, 17. 



gel or sol, 22. 



in colloidal state, 22, 39. 



plasmolysis, 14, 15. 



nature of, 10, n, 12. 



of cell of Elodea canadensis, 42. 



Chlamydomonas, 36, 37. 



yeast, 24. 



" physical basis of life," 17, 33. 



production of enzymes by, 33. 



respiration a physiological character- 



istic of, 33. 



semi-permeable, u, 14. 



streaming of, 48. 

 Protoplasmic connections, 77, 115. 

 Protoxylem, 150, 173, 186, 187, 188, 



192, 220, 221, 223, 241. 



Putrefaction, 52. 

 Pyrenoid, 37, 69, 77, 81. 



of Chlamydomonas, 37. 



RACHIS of Aspidium, 153. 



Radial section, 188. 



Ranunculus bulbosus and R. repens. 

 Lectures XXV. and XXVI., 

 215-238 (Figs. 73, 74, 75 76, 77, 

 78, 80, 81, 82, 83). 



air-passages of, 217, 222. 



anther of, 231. 



anther-lobe of, 231. 



antipodal cells of, 234. 



archesporia of, 231. 



bast of, 217, 220. 



bundle-sheath of, 217, 218, 219. 



calyx of, 230. 



carpels of, 232, 236. 



chromatophores of petals of, 231. 



conducting tracts of, 217. 



connective of, 231. 



corolla of, 230. 

 cortex of, 216. 



cotyledons of. 235. 



cuticle of, 216. 



dehiscence of pollen-sacs of, 232, 

 embryo of, 235. [ 2 34- 



- embryo-sac of, 234, 236. 

 endosperm of, 238. 

 ep : dermis of, 216. 



filament of, 231. 



flowers of, 230. 



fruit of, 236. 



fusion-nucleus of, 234. 



gametophyte, female of, 235. 

 male of, 237. 



germination of pollen-grain, 235. 

 seed oT, 236. 



integuments of, 234, 236. 



leaves of, 215, 222. 

 life-history of, 236. 



compared with those of Arche- 



goniates and ot Pinus, 238. 



medullary rays of, 217. 



micropyle of, 234. 

 nucellus of, 234. 



ovary of, 233, 237. 



ovule of, 233. 



ovum of, 234. 



palisade parenchyma of, 222. 



petals of, 230. 

 pith of, 217. 



polar nuclei of, 234. 



pollen-grains of, 232, 236. 



pollen-mother-cells of, 231. 



- pollen-sacs of, 232. 



pollination of, 234. 



root-pressure in, 228. 



roots of, 223. 



seed of, 230, 236. 



sepals of, 230. 



spongy parenchyma of, 222. 



sperm-cells of, 235. 

 stamens of, 231, 236. 



