WHAT AEE THE STARFISHES ? 



61 



the lobster can shake off any of its limbs. But the 

 Brittle Stars can simply shatter themselves to pieces, 



Fig. 4. BRITTLE STARS, OR SNAKE-TAIL. 



leaving nothing but the small central disk. Consequently 

 it is no easy matter to obtain a perfect specimen. Pro- 

 fessor Forbes tells a ludicrous story of his discomfiture 



