PLATE 116. STARFISH, SEA-URCHINS AND SEA-CUCUMBERS. 



1. Sea Egg or Sea-urcliin [Wana]. 2. The saiiH> witli the spines removed. 3. Sea- 

 beaver or Heart-urchin. 4. Aristotle's lantern: tlie masticating organ of a sea-urcliin. 5. 



( Descrijition of Plate Continued on the Opposite I'age.) 



