" EOLIS GLAUCA. 



The Boris vermigera of Turton (British Fauna, p. 133,) might be considered to belong- 

 to this species, with which it sufficiently agrees, did it not equally agree with E. papillosa, 

 which common species Dr. Turton was much more likely to meet with on the Mumble Rocks, 

 than one of so great rarity as the present, whose habitat is probably always beyond low- 

 water mark. 



Figs. 1, 2, 3. Eolis glauca, different views. 



4. Two of the papillae more highly magnified. 



