SEA- ANEMONES. 99 



white variety ; the darkness of the background beautifully 

 setting off its pellucid feelers. 



Sagartia troglodytes. 



It is so named from its habit of choosing holes suited to 

 its size, in which it Hves, and into which it withdraws when 

 disturbed ; or it will bury itself in sand, producing and 

 displaying its head above the surface, or at the head of its 

 hole. The people classically known as Troglodytes, re- 

 ported to have lived in caves and burrows, near the Gulf 

 of Arabia, have suggested the name of this interesting 

 species. 



Sagartia bellis. 



The Ba'isy Anemone also delights in hollows and fissures, 

 into which it can withdraw and defy the collector who ap- 

 proaches it in its native haunts. The body of this Actinia, 

 when fully expanded, is generally thinner in the middle 

 than towards either extremity. In that condition, its suck- 

 ing disc is expanded, and its oral disc spread out like the 

 mouth of a trumpet. Sometimes the body is formed into 

 a kind of cup at the upper end, and the disc hollowed into 

 it. However deep the hole in which the Daisy Anemone 

 lives, he must stretch out his body to reach the surface, so 



