OCEAN ANIMALS: SPONGES, SEA-ANEMONES, ETC. 13S 



in the center of the under side and all the body parts 

 radiating out from this Center. 



If a starfish, either fresh or preserved in alcohol, can 





Fi(, 96. — A group of Echino- 

 ileims; the upper one a star- 

 fish, Asterina 7nineata, the 

 one at the right a starfish, 

 Asti-rias ocracia, at the left 

 a brittlestar, species un- 

 known, and at bottom two sea-urchins, Strongyloceiitrotus franciscanus. 

 (One-third natural size; from living specimens in a tide -pool on the Bay 

 of Monterey, California.) 



be had for examination, note that the body is covered by 

 a skeleton composed of little plates, on which are short 

 stout spines arranged in irregular rows. At the tip of 

 each arm or ray there is a small red speck, the very 

 simple eye of the animal. The starfish cannot see with 

 this "eye"; it can only distinguish between light 



