Illustrations iz 



FACING 

 PACK 



MENDEL'S LAW ILLUSTRATED IN PEAS 380 



MENDELIAN INHERITANCE IN WHEAT 881 



(After R. H. Biffen.) 



THE IDEA OF GERMINAL CONTINUITY . 381 



MENDELISM IN MICE .......... 384 



Photo: British Museum (Natural History;. 



MENDELIAN INHERITANCE IN ANDALUSIAN FOWLS . ... 385 



(After Darbishire.) 



HALF-LOP RABBIT 388 



INHERITANCE IN SNAILS, WITH BANDLESS AND BANDED VARIETIES . 388 

 (After Lang.) 



THE RUFF (Machetes pugnax) 389 



(From specimens.) 



MODEL OF THE EXTINCT DODO ........ 398 



Photo: Royal Scottish Museum. 



THE EVOLUTION OF BIRDS 398 



After W. P. Pycraft. 



BIRDS AND THEIR FOOD 399 



GREAT AUK (WITH EGO) 402 



Photo: Royal Scottish Museum. 



THE KIWI OR APTERYX ......... 402 



Photo: James's Press Agency. 



GANNET A LESSON FOR AVIATORS ....... 403 



From Our Common Sea-Birds (Country Life, Ltd.) 



THE GANNET PUTTING ON THE BRAKE ...... 403 



From Our Common Sea-Birds (Country Life, Ltd.) 



HERRING-GULLS (Larus argentatus) ....... 406 



From Our Common Sea-Birds (Country Life, Ltd.). Photo: J. C. Douglas. 



GOLDEN EAGLE ........ . 406 



Photo: Royal Scottish Museum. 



RAVEN ........ . 407 



Photo: James's Press Agency. 



SECRETARY BIRD ........... 407 



Photo: F. W Bond. 



