132 LAKES AND RIVERS. 



a nest. It collects little pieces of stick and fibres, 

 which it fastens together, leaving the inside hollow for 

 the reception of its eggs. The task of making the 



BULLHEAD. 



nest and depositing the eggs is said to occupy one day 

 only, and the male "fish watches assiduously over the 

 eggs and young fry. About a month intervenes until 



GREY MULLET. 



the young emerge from the nest. The Grey Mullet 

 (Mugil capita) inhabits estuaries on the coast, and in 

 summer is found in muddy bottoms of rivers, so that 



