THE BABY BRITTLE-STAR. 
79 
of those still larger Encrinites or Stone-Lilies, often 
more than five feet long, which we find fossil in the 
solid rocks of the earth, and which, though they look 
like the remains of stony plants were once true ani- 
mals, feeding in the seas of ages long past by whirling 
the tiny sea-animals into the centre of the cup where 
their mouth lay turned upwards to the water. 
No. 2 did not advance so fast, his jelly body had 
been from the beginning supported upon eight thin 
Fig. 32. 
The infancy of the Brittle Star-fish. Miiller. 
A, The jelly-animal swimming and feeding while the Star-fish b, 
with its rays c, is forming inside it. 
B, The young Brittle Star-fish which has swallowed the jelly and 
settled down upon the rock. 
lime rods (a a, Fig. 3 2), causing him to swim along 
somewhat in the shape of a pyramid on legs, and he 
continued to float and feed in this shape for a 
considerable time. Meanwhile, just within his mouth 
some small cells appeared which gradually .formed 
themselves into a round disc. By and by it was 
clear that a trellis-work of lime was forming over this 
disc (b, Fig. 32), and five tiny stony arms (c} began 
to grow out of it like the rays of a star. Still, how- 
ever, the jelly- animal continued to feed through its 
