REGENERATION AND DEATH 173 



of a mammal named Tarsius spectabile. It is a crea- 

 ture nearly related to the lemurs, having a special 

 interest to naturalists, owing to the fact that in its 



FIG. 60. THE SEGMENTATION OF THE OVUM OF Planorbis, to show the 

 earliest phases of development of the egg of a pond snail ; magnified about 320 

 diameters. After Carl Rabl. 



early development it offers features of resemblance 

 to man which are very striking and instructive. The 

 plate is from a series of drawings made under the 



