276 



PROBLEMS OF RELATIVE GROWTH 



Pinnotheres, 37, 94, 95. "9 



Pistol-crab, 34, 96 



Pisum, 21 



Planarians, 14, 21, 53, 172, 174, 179, 



261 

 Planorbis, 156, 160 

 Plants, 14 

 Portunus, 166, 189 

 Potamobius, 27 

 Potamogeton, 202 

 Prawn, 34, 84, 92, 123, 125 

 Productus, 163 

 Protohippus, 107, 109 

 Psilotum, 223 

 Pteropod, 159, 163 

 Pupa, 161 



Rabbit, 201, 202, 215, 227, 257 

 Rat, 1, 16, 183, 185, 187, 200, 201, 



202, 263 

 Ratitae, 226 

 Razor-shell, 162 

 Red-breast, 215 

 Red-deer, 42, 43, 44, 47, 48 

 Reindeer, 188 

 Rhinoceros, 150, 173 

 Roe-deer, 45, 46, 47, 208 



Sacculina, 38, 170, 197 



Salamander, 17, 203 



Sardine, 259 



Scallop, 161 



Sheep, 17, 88, 89, 90, 153, 188, 201, 



222, 223, 238 

 Solen, 162 

 Sphaerium, 203 



Sphodromantis, 50, 5111., 125, 135 

 Spider, 125, 261, 262 

 Spider-crab, 34, 36, 38, 53, 54, 69, 



122, 123 

 Sprat, 116 

 Stag-beetle, 25, 55, 58, 59, 76, 113, 



114, 115, 207, 208, 209 



Stick-insect, 27, 175 

 Stomatopoda, 118 

 Sun-fish, 104 

 Swallow-tail, 55, 57, 188 

 Swan, wild, 225 



Tadpole, 173, 182 



Telmessus, 93 



Tenebrio, 16, 25, 26, 27, 28, 29 



Termes, 66 n. 



Termites, 65-7, 258 



Tern, 263 



Theridion, 261 



Thrush, 225 



Tit, 215 



Titanotheria, 218, 219 



Tridacna, 162 



Trilobites, 134 



Triticum, 21 



Triton, 179, 180 



Tropaeolum, 14, 16, 176 n. 



Turnip, 13, 21 



Turritella, 161 



Uca, 8-12, 31-5, 41, 80, 82, 83, 84, 85. 



119, 121, 168, 189, 216, 227, 238 

 Undulina, 86 n. 

 Ungulates, 87 

 Upogebia, 98, 99 

 Urodele, 135, 181 



Vole, 40 



Water-boatman, 25, 27 

 Water-beetle, 25 

 Wax-moth, 16, 29-31 

 Whale, 16, 135, 136 



Xylotrupes, 61, 72, 76 



Zoothamnium, 117 



Printed in Great Britain by Butler & Tanner Ltd., Frome and London 



