226 ANIMAL LIFE AND HUMAN PROGRESS 



Preventive medicine, 26 



Primates, 107, 108, 110, 115, 118, 



121, 123, 126, 127, 130, 131 

 Privy Council for Scientific and 



Industrial Research, 78 

 Prototheria, 116 

 Punnett, Prof., 5, 93, 155 



Quekett Microscopical Club, 71 



Rabbit, 68, 85, 92, 181 



Rat, 85, 86, 137, 146, 180 



Rates of increase, 34, 41, 56 



Recapitulation in development, 113, 

 121, 125 



Reconstruction, social, 95 



Red-buck, 90 



Red flour-beetle, 9 



Redia, 143, 144 



Red-water, 91 



Regan, Mr. Tate, 12, 63 



Regression, law of, 43 



Reproduction, 34, 42, 59 



Reproductive system, human, com- 

 parison with other Primates, 

 118 



Reptiles, 32, 84, 85, 105, 115, 116, 

 215 



Research, 95, 105, 183, 218, 219 



Reversion, 53, 115 



Rhizopertha dominica, 8 



Ehodeus amarus, 85 



Rinderpest, 210 



Rockefeller, Mr. J. D., 154 



Rockefeller Sanitary Commission, 

 154 



Round-worms, 149, 150, 151, 152, 

 153 



Royal Society, the, 218 



Rudolphi, 141 



Ruffer, Sir Armand, 136 



Salmon, 193 

 family, 72 



Sanya or Iron-wood tree, 214 

 Saw-toothed beetle, 9 

 Scale-insect, 87, 92 

 Scale of life, 103, 104, 105, 107, 108, 



120, 127 



Schistosoma, 91, 146 

 Seat-worm, 138 

 Sea-water, alkalinity of, 200 

 Secondary sexual characters, 172-175 

 Segregation, habitudinal, 73 



Segregation, Mendel's law of, 53 

 Sex, experimental analysis of, 52, 



167, 169-175 

 Shad, 72, 197 

 Sheep, 92, 141, 143 

 Shelley, 84 

 Shipley, Dr., 12 

 Siebold, 144 

 Silkworm, 92 

 Silvanus surinamensis, 9 

 Skull, human, comparison with other 



Primates, 112, 113, 114 

 Sleeping sickness, 13, 37, 90, 210, 



216, 217, 218 



prevention of, 217, 218, 219 

 Smith, Allen J., 151 

 Smith, Dr. S. A., 129 

 Snails, fresh-water, 91, 144, 145, 146, 



147, 148, 149 

 Snake, 85, 89, 92 

 Sole, 193 

 Somatoplasm, 47 

 Species, fixity of, 104 



origin of, 71, 72, 73, 74, 77 

 Spencer, Herbert, 34 

 Sphegidae, 38 

 Spider, 38 



Spiny dog-fish, 203, 204 

 Spontaneous generation, 137, 140, 



141 



Sprat, 193, 202, 204 

 Sprengel, 83 

 Squirrel, 89, 215 

 Stable-fly, 91 

 Starfish, 39 



Steenstrup, van, 143, 144, 145 

 Stegomyia fasciata, 90 

 Stirps, theory of, 46 

 Stomoxys calcitrans, 91 

 Strauss, 27 

 Strepsorrhini, 110 

 Struggle for existence, 4, 5, 13, 21, 



27, 31, 32, 34, 38, 41, 42, 56, 95, 



131 



Sugar-beet, 43 

 Survival of the fittest, 27, 31, 40, 



56, 131 



Taenia solium, 141 

 Talgai man, 129, 130 

 Tapes, 39 



Tapeworm, 137, 140, 141, 142 

 Tarsius, 110, 111, 118, 119, 120, 126, 

 127 





