66 HALF-HOURS IN THE GREEN LANES. 



graceful movements of the whole organ, and of each 

 tentacle separately, must be seen to be thoroughly 

 appreciated. 



Fig. 58. 



Lophophore of Plumatella repens, X 120. 



And now we leave our young student, after having 

 directed his attention to the principal objects of the 

 tarn, to make his way for himself. Every new 

 form identified will be to him a fresh source of 



