sea-a>:emones. Ill 



quently, and although, when observed,, the motion is not 

 quite perceptible, yet in the evening you may leave him 

 seemingly fixed at the bottom of one end of the tank, and, 

 in the morning, find that he has crawled up to the top of 

 the glass sides at the other end. When seen through the 

 glass a curious view is afforded of the broad circular disc 

 which constitutes the base of his stem, and which cor- 

 responds with the foot of the Gasteropodous Mollusca, — in 

 fact, it is his organ of locomotion. It is generally nearly 

 white, or partaking slightly of the body tint, as seen through 

 its transparent, jelly-like substance. Trom nearly the centre 

 to the circumference, radiate opaque tliread-like lines which 

 increase in number near the outer edge. Those who have 

 seen sections of Star-corals would at once recognize the 

 resemblance of these fibres to the bony plates constituting 

 the skeleton of the latter. 



The Anthea has the power of swelling out parts of its 

 body into lobes, which assist it in crawling. In doing this it 

 spreads out a portion of tlie disc on the side towards which 

 it is travelling, gets a firm hold by that portion, and then 

 draws up the rest to it; repeating the process until the 

 distance is accomplished. It will sometimes come to the 

 edge of the water, and keeping its attachment by part of 



