234 



NATURE-STUDY REVIEW [11:5— May, 1915 



Fig. 2. 



shape of the body, proportion of the different parts and the location 

 of the joints are fixed in the memory. 



One way of preserving the best cuttings is to mount them on a 

 large sheet of paper thus making a class problem. 



FOLD 



JUT 



Fig. 3. 



jxr 



