WILD PASTURES 



ward end of this trail you will find a 

 unio in it, generally a young one, for it 

 is he that has left the mark behind him 

 in his travels. For the unio at a certain 

 age is a great traveller; that is, when 

 he is very young. The adults foot it, 

 but the young before they reach their 

 full growth ride, some of them by what 

 you might call the lightning expresses of 

 the pond world. 



If you will split a big one at this time 

 of year you will be likely to find within 

 an astonishing number of eggs. These 

 are carried in brood pouches that seem 

 to occupy pretty nearly all the space be- 

 tween the shells. In seeing them you 

 wonder vaguely where there was room 

 for the bearer of this amazing progeny. 

 Just where they are these young unios 

 grow to maturity of a certain sort, 

 forming minute shells which have hooks, 

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