Brrs BY POND, R/^ER, AND SEASHORE. 181 



shore are barnacles. They cover stones and wood- 

 work and ironwork; and when once they have 



iAKNACLES AND PUKl'LE SHELLS ON HOCKS. 



established themselves, it is not long before shell 

 joins shell, and fresh settlers arrive to extend 

 the limits of the colony. Not unnaturally many 

 visitors to the seaside consider them to be 



