CONTENTS. 



Page. 



Planaria Flexilis, 5 



Planaria Nigra, 23 



Planaria Panniculata, 37 



Planaria Felina, 42 



Planaria Arethusa, 8 



Planaria Graminea, 114 



Planaria Velox, 127 



Planaria Edinensis, 133 



Explanation of the Figures, 145 



