MOLLUSCA OR UNIVALVES. 201 



very great difficulty, although it can detach 

 itself with ease. It is always found near the 



surface of the water, and on serene nights 

 feeds on the vegetation which springs up on 

 the shore. 



The Haliotis is found in New Holland, 

 China, the Cape of Good Hope, the Moluccas, 

 &c. ; but the most common species which is 

 preserved in conchological collections is the 

 Haliotis tuberculata, represented in the last 

 figure, which is found in great abundance on 

 the coasts of Guernsey and Jersey, where the 

 animal is used for food; and the shells are 

 frequently arranged in patterns on the outside 

 of the cottages, being cemented into the 

 mortar, with the inside exposed: these have 



