xii LIST OF PLATES 



PAGE 



ADDERS (Vipera berus\ MALE AND FEMALE THE RARE SMOOTH SNAKE 



(Coronella lavis) RATTLE OF RATTLESNAKE . . .116 



COMMON TOAD (Bufo vulgaris) COMMON FROG (Rana temporaria] -TOAD 



SPAWN FROG SPAWN . . . . . . .128 



MALE CRESTED NEWT (Triton cristatus) THREE-SPINED STICKLEBACK (Gas- 



trosteus aculeatus) MINNOWS (Leuciscus phoxinus) . . . 144 



EARWIG WING OF EARWIG NEST OF EARWIG QUEEN WASP MALE AND 



FEMALE COCKROACH . . . . . . .178 



LARGE CABBAGE WHITE BUTTERFLY, SUCCESSIVE PHASES . =184 



