264; HISTORY OF BRITISH ZOOPHYTES. 



them, in a vase by itself^ performed movements which ap- 

 peared to me extraordinary in a creature of so soft a con- 

 sistence, after I had given it a fresh supply of water. "With 

 a lens, I perceived that these movements were caused by the 

 presence of an animalcule, which the Lucernaria seemed to 

 pursue, turning to the right and to the left, endeavouring to 

 catch it. Every time that it removed to the distance of 

 about an inch, the Lucernaria ceased to move ; if it drew 

 nearer, the chase forthwith recommenced, and the move- 

 ments were 'quick and lively. The animalcule was at last 

 caught by the tentacula of one of the rays, which imme- 

 diately bent back towards the mouth ; the other rays con- 

 tinued always expanded : this ray resumed, by degrees, its 

 ordinary position. Having procured other animalcules, I 

 gave them to my Lucernaria, and I had the pleasure of 

 seeing the same movements repeated." 



4. LUCERN^UIIA CYATHIFORMIS, Sars. 



Hab. Southend, Arran, D. L., jun. ; Corrigils, Arran, 

 D. L. 



So far as I have known, this Lucernaria has not been 

 observed anywhere in Britain except in the island of Arran. 

 A few years ago it was got in great abundance on rocks in 

 the sea at Southend, isle of Arran, and as Mr. Alder was 



