DOPJS. 143 



It is sometimes of a pale yellow, and sometimes 

 milky-white. 



THE DORIS. 



There is another species which grows to a large 

 size ; this is commonly called the Sea-lemon, from 

 some fancied resemblance to that fruit when cut in 

 half lengthways. Its technical name is D. tuber- 

 culata. 



I captured one of these animals at Joppa that 

 measured nearly five inches in length. It was of a 

 cream colour, almost approaching to a white, while 

 on several parts of its body were patches of the most 

 brilliant purple, and also numerous tubercles. 



I tried to preserve it by dipping it in fresh water, 

 but it emitted such a quantity of mucus, even after I 

 had the trouble of changing the water four or five 

 times, that I felt so disgusted as to throw it out of 

 the window. 



The Eolis is a more difficult object for the unprac- 

 tised eye to discover than the Doris; and even those 

 familiar with its likeness, would fail to recognise in 

 the strange mass before them the beauteous Nudi- 

 branch of the picture-books. 



And yet it is only by illustrations and written 



