MARINE BIOLOGICAL STATION AT PORT ERIN. 



87 



abundant on rocks round our coast, and which by their 

 white limy shells closely placed on the dark grey rock of 

 Bradda Head give at low tide the appearance of a belt of 

 whitewash encircling the base of the cliff. The ship- 

 barnacle (Lepas) is closely related to Balanus. Its home 

 is on the open sea, but specimens are occasionally drifted 



Fig. XII. 



in to Port Erin. Once we captured a floating ship's 

 bucket, which was covered inside and out with adhering 

 barnacles, some large and some small. 



Most of the lower Crustacea (or Entomostraca), unlike 

 the barnacles, are free-swimming ; and from their small 



