Photo: J. J. Ward. 



A BUNCH OF ZOOPHYTE GROWING ON THE SHELL 

 OF A HORSE-MUSSEL 



Superficially the zoophyte looks a little like seaweed; but 

 closer examination shows it to be a great colony of minute 

 tubular animals or polyps. In this case the association is quite 

 external. The zoophyte is "epizoic" on the mussel, just as 

 moss may be "epiphytic" on a tree. 



Reproduced from Fabre's " The Wonders of Instinct." 



THE BLUEBOTTLE LAYING HER EGGS IN THE SLIT OF A DEAD BIRD'S BEAK 



