BARNACLES. 



277 



will be found adhering to the point of attachment 

 a fringed oval object, which is part of a gill. Even 

 in the lobsters, therefore, foot-locomotion is also 

 partly subservient to breathing purposes. We have 

 several species of both stalked and unstalked bar- 

 Fig. 209. 



Goose Tree (Anseres arborei). 

 From the ' Cosmographia Universalis ' of Munster. 



nacles, of which Scalpellum vulgare (usually found 

 attached to the base of those corallines called " lob- 

 ster's horn ") are abundant among the former, and 

 Balanus hameri not unfr.equent among the latter. 

 The young of Scalpellum pass through very similar 



