246 



PHYLUM ANNELIDA 



their active life for the night. Then, prompted by " love " 

 and hunger, they roam about on the surface, leaving on 

 the moist roadway the trails which we see in the morning. 



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More cautiously, however, they often remain with their tails 

 fixed in their holes, while with the rest of their body they 

 move slowly round and round. The nocturnal peregrina- 

 tions, the labour of eating and burrowing, the transport of 



