66 



THE STUDY OF ANIMAL LIFE CHAP. 



many kinds and colours, are thus used ; but these various 

 substances are nearly always symmetrically placed on 

 corresponding parts of the body, and particularly long 

 plume-like pieces are fixed on the head." Thus, as 

 Carus Sterne says, is the story of ' Birnam's walking 

 wood ' re-enacted on the sea-shore. Furthermore, a 

 Stenorhynchus which has been cleaned will immediately 



FIG. 17. SACK-BEARING CATERPILLAR (Saccophora). 



(From Bates.) 



begin to clothe itself again, with the same care and pre- 

 cision as before. Mr. Robertson of Millport often saw 

 Stenorhynchus longirostris a common crab picking about 

 its limbs and conveying the produce to its mouth. " If 

 other observations confirm the view that this animal is 

 a true vegetarian, we shall have one example at least 

 of an independent agriculturist, who is not only superior 

 of his lands, but carries them with him when he re- 



