HALF AN HOUE WITH CRUSTACEA. 



247 



gracile, Fig. 134) is abundant, and said to be some- 

 times parasitic on jelly-fish. They may be found 

 under the stones and roots of sea-weed at low water. 



Fig. 132. Pdllene pygmsea, X 16. 



When disturbed, they will catch hold of anything 

 that comes in their way, and help them to escape. 



