INDEX 



407 



RABBITS, increase of in Australia, 114 

 RADIOLARIA, 336 

 RADIUM, its rarity and uses, 361 

 RAMSAY, Sir A., on life of the Cambrian 



age, 192 



RECOGNITION by butterflies, 167 

 RECOGNITION-MARKS important for 



evolution, 156; explained, 158; 



objection to answered, 165 ; general 



conclusions on, 171 

 RELIGION, gradual rise of a true, 280 

 REPTILES, earliest, 198 

 REPTILIAN life of secondary period, 



211 

 RETROGRESSIVE development in birds, 



286 



RHIZOPODA, 336 



RICE-BIRD, diagram of variation of, 1 10 

 RIDLEY, Mr., on flora of Singapore, 73 

 RIVER-BASINS, rate of denudation of, 



175 



ROSCOE, Sir H., on properties of 

 carbon, 363 : on water in relation 

 to life, 366 



SALEEBY, Dr., on eternity as an ex- 

 planation, 351 



SAP, extreme production of, 277 



SAUROPTERYGIA, 207 



SCALES on wings of butterflies, 301 ; 

 apparent purpose of, 303 



Scelidosaurus karrisoni, skeleton of, 



202 



Sceloditherium leptocephalum, skeleton 



of, 238 

 SCLATER, Dr. P. L., on species of 



birds, 88 

 SEEBOHM, H., on food of birds in 



Arctic regions, 136 



SETON - THOMPSON 011 recognition- 

 marks, 159 



SHARPE, Dr. B., on species of birds, 88 

 SHIPLEY, A. E., table of described 



animals, 92 

 Simethis bicolor, one locality of in 



Britain, 24 

 SINGAPORE, flora of, 72 ; destruction 



of forest in, 7 7 

 Sisymbrium sophia, power of increase 



of, 113 

 SMALL-BRAINED animals, purpose of, 



284 

 SOUTH AFRICA, Cape Region, flora 



of, 72 

 SOUTH AMERICA, tertiary mammals of, 



233 



SPALACOTHERIUM, 213 



SPARROWS at Rhode Island, work of 

 natural selection on, 128 



SPECIES denned, 1 1 ; distribution of, 

 12; uncertainty of limits of, 23; 

 rarity of precedes extinction, 24 ; 

 number of, in relation to evolution, 

 93 ; variation of, 104 ; extremely 

 common, 105 ; to be seen every- 

 where, 1 06 



SPENCER, H., on co-ordination of 

 variations, 256 ; reply to, 257-60 ; 

 his "unknown reality" more con- 

 cretely expressed, 399 



SPIRIT-LIFE described (inspirationally) 

 by Poe, 398 



SPRINGBOK, curious recognition-mark 

 on, 162 



SPRUCE, Dr., on rich flora of Amazon, 



57 



Sterrolophus flabellatus, skull of, 203 

 STONE -CURLEWS, recognition -marks 



of, 163 

 SYDNEY, extreme abundance of orchids 



near, 38 



TABLE of De Candolle's botanical 

 regions, 18 ; of chief natural orders 

 in various floras, 21 ; of number of 

 species in large and small areas, 26 ; 

 of number of species in different 

 latitudes, 29 ; of floras of European 

 countries according to latitude, 29 ; 

 of floras of North American areas, 

 30 ; of warm temperature floras, 33 ; 

 of European floras of small areas, 

 34 ; of extra - European temperate 

 floras, 36 ; of large tropical floras, 

 42 ; of chief orders of flora of British 

 India, 44 ; of chief orders of tropical 

 Sikkim, 45 ; of chief orders of Malay 

 peninsula, 45 ; of chief orders of the 

 Philippines, 50 ; of chief orders of 

 Celebes, 52 ; of chief orders of 

 Madagascar, 55 ; of chief orders in 

 tropical American floras, 59 ; of 

 chief orders of Mexico and Central 

 America, 60 ; of chief orders of 

 Nicaragua to Panama, 62 ; of chief 

 orders of Lagoa Santa, 67 ; of 

 number of species in tropical floras 

 of small area, 71 ; of number of 

 species in temperate floras of small 

 area, 7 1 ; of distribution of lepidop- 

 tera in Britain, 83 ; of distribution 

 of coleoptera, 84 ; of described 

 species of orders of insects, 85 ; of 

 species of birds in Europe, 88 ; of 



