THE JELLY-FISH 1333 



cilia, or moving hairs, and resemble the planulas of 

 the jelly-fish in shape, and they swim freely, and 

 finally settle down on a stone or weed. They become 

 environed by a horny coat, the stomach having been 

 formed first by simple bending in of the outside of 

 the creature, and tentacles grow. The planula thus 

 founds a new colony. But there are other phases in 

 this curious life-story; for instead of the little round 

 balls in the closed cups getting free as planulas, some 

 in certain kinds grow there, and resemble excessively 

 minute jelly-fish stuck fast by the back, and expos- 

 ing the mouth, feet, and the fringed umbrella. These 

 Medusae, as they may be called, die on the parent, 

 and never wander. 



There is one kind of these Garland polypes called 

 Lafoea in which the round bodies produced in the 

 closed cups burst forth, and not in the shape of plan- 

 ulas. They come forth like tiny bells, furnished 

 with minute eye-spots on the edge, and they have an 

 umbrella shape, and* long tentacles arising from the 

 edge near the eye-spots. They are jelly-fish, to all 

 intents and purposes, and swim freely about, and in 

 time produce planulas which develop into a parent 

 Garland polype again. 



There is a very interesting kind of these allies of 

 the sea-jellies which, from its feathery shape, has 

 been called Plumularia. Specimens are common, 

 and there is a stem, and it has branches, and the 

 cups are in one row on the branchlets. Moreover, 

 there are openings in the horny envelope of the soft 

 pith of the branches, which do not give exit to a 

 polype-looking thing with its mouth surrounded with 



