xvi INSTANCES OF THE WONDER OF LIFE 



FAQE 



the immxmity of hedgehog and some other mammals to 



snake poison ........ 532 



the wealth of colouring in the animal kingdom . . . 534 



the partnership between Convoluta and an Alga . . 535 



pigments as waste-products, reserve-products, and by-products 536 



the ripple-marks of growth ...... 536 



the internal uses of pigmentation ..... 538 



the protective value of coloration ..... 539 



an insect protected by its meals ..... 542 



the plasticity of the jEsop Prawn ..... 545 



coloration expressing nervous rhythm .... 546 



warning colours among animals ..... 648 



recognition-marks and guide-marks ..... 549 



the significance of the rabbit's white tail .... 549 



the decorations of the mouth in some nestlings . . . 549 



the peacock's tail ....... 550 



a starfish regrown from a single arm .... 555 



portions of minced sponge regrowing a whole . . . 557 



regeneration of a stork's bill ...... 562 



regeneration of a newt's lens ..... 363, 570 



an antenna regrown instead of an eye .... 569 



the same result reached by different paths . . . 569 



the regrowth of a snail's horn, including the eye . . 571 



great steps in evolution . ...... 575 



the first making of a ' body ' 576 



the beginning of bilateral symmetry . . . 576 



the gradual emergence of nobler forms of Ufe . . . 577 



the first finding of a Vertebrate voice .... 578 



the steps of progress made by Amphibians . . . 578 



the fitness of the environment to be a home of life . . 579 



the method of organic evolution, trial and error . . 582 



the mystery of variations .... . 584 



the tactics of Nature ....... 586 



new things made out of very old things .... 586 



altering the ' time ' of a vital tune ..... 588 



the optimism of pathology ...... 589 



trading with Time ........ 591 



registration without memory ...... 592 



blindness following imprisonment in darkness . . . 593 



a remarkable experiment with water-fleas . , , , 597 



