Illustrations 



FACING 

 PACE 



A NUMBER OP CELLS WITH INTERLACING FIBRES FROM THE HUMAN 



CEREBRUM (highly magnified) . ... 684 



From Quain's Anatomy (Longmans, Green & Co.). 



REPRODUCTION BY BUDDING ....... . 684 



From A Manual of Elementary Zoology, by L. A. Borrodaile (Oxford 

 Medical Publications). 



A DIAGRAM OF THE "REFLEX ARC" . . 684 



From A Manual of Elementary Zoology, by L. A. Borrodaile (Oxford 

 Medical Publications). 



A CHAIN OF FLAT-WORMS PRODUCED BY FISSION, AS YET INCOMPLETE 



(after Graff) .685 



Reproduced from Student's Text Book of Zoology (Sonnenschein). 



SORI OR SPORE-CASES ON FERN (Polystichum) . . 685 



PROTHALLUS OF FERN: ORGANS PRODUCED FROM SPORE OF FRONDS . 685 



PROTHALLI (NATURAL SIZE), ON WHICH ARE SEEN DEVELOPING THE 



YOUNG FERNS WITH THEIR FIRST FRONDS .... . 685 



Photos: J. J. Ward. 



A PHOTOGRAPH (HIGHLY MAGNIFIED) OF RIPE POLLEN-GRAINS FALL- 

 ING FROM THE STAMENS OF A MALLOW FLOWER AN ENORMOUS QUAN- 

 TITY OF LIVING MATTER PRODUCED IN AND BY THE GERM-PLASM . 688 

 Photo: J. J. Ward. 



ILLUSTRATING REGENERATION ........ 689 



From Regeneration and Transplantation, by Dr. E. Korschelt. 



EXPERIMENTAL EMBRYOLOGY ... . . 689 



From Experimental Embryology, Jenkinson (Clarendon Press). 



ILLUSTRATION SHOWING DIFFERENT STAGES (A, B, C) OF GROWTH OF 

 TADPOLES PRODUCED BY GRAFTING THE FRONT END OF ONE SPECIES 

 ON TO THE HIND END OF ANOTHER (after Harrison) . 689 



From Regeneration and Transplantation, by Dr. E. Korschelt. 



FEMALE SMOOTH NEWT (Triton tceniatus) PHOTOGRAPHED BELOW WATER 



IN THE ACT OF DEPOSITING ONE OF ITS EGGS ..... 692 



EGGS OF SMOOTH NEWT ON THE LEAVES OF WATER PLANTS . . . 692 

 YOUNG NEWT TADPOLES NEARLY READY TO EMERGE FROM THE EGG . 692 

 SMOOTH NEWT TADPOLES JUST AFTER LEAVING EGG . . . 692 



TADPOLE OF SMOOTH NEWT, SHOWING THE FEATHERY GILLS WHICH 



FLOAT UPWARDS ABOVE ITS HEAD ....... 692 



