140 



GENUS EBALIA. 



particularly pointed out in the descriptions of the several 

 species. At present I am not aware that either of them 

 has been found in any other locality than on our own 

 coasts ; but Dr. Edwards describes a species existing in 

 the French Museum, and I 'have specimens from Mr. 

 Cuming's collection from the western coast of America, 

 which must be referred to this genus, but belonging to a 

 new and very remarkable species. The genus was formed 

 by Dr. Leach, who, with great propriety, separated it 

 from his genus Leucosia, to which he had at first referred 

 the species then known. 



The family of which this genus forms a part is perfectly 

 natural and well defined, and contains many very inter- 

 esting forms, all of them so characteristic as to exhibit 

 at once their close relation to each other. 



