Crjislaceans. 53 



Some of the crustaceans — which is the name of 

 the large family to which the lobster belongs — 

 have skin changes which remind one of what hap- 

 pens to the salmon during the breeding season; 

 only, these skin changes are utilized in a very clever 

 way, for they form a receptacle where the eggs are 

 deposited as in a nest, and in some of these a fluid 

 is secreted which is used as food for the young ! 



Thus the parent is enabled to perform the 

 most perfect parental functions, and in her own 

 body find home and nutriment for her helpless 

 descendants. 



