CONTENTS. 



THE FEOG (PLATES I. TO VII.) ..... 



THE CRAYFISH (PLATES VIII. TO X.) ... ... ,,31 



THE EARTHWORM (PLATES XI., XII.) 45> 



THE SNAIL (PLATES XIII., XIV.) ... 5 * 



THE MUSSEL (PLATES XV. r XVI.) ... 61 

 THE HYDRA (PLATE XVII.) .... 



THE UNICELLULAR ORGANISMS (PLATE XVIII.) . 73 



THE FUNGI (PLATE XIX.) ,,77 



THE STONEWORTS (PLATE XX.) .... ,,81 



THE FERN (PLATES XXL, XXII.) 



THE FLOWERING PLANT (PLATES XXIII., XXIV.) .. 



APPENDIX AND BIBLIOGRAPHY 105 ' 



