366 ^W^ ANIMAL KINGDOM 



Figure 19.7. A, The common starfish, Asterias, eating a fish. Transparent lobes of 

 the cardiac stomach can be seen surrounding the body of the fish. A number of tube feet 

 are being used to hold the starfish to the side of the aquarium. (Courtesy Robert S. 

 Bailey.) B, A Caribbean brittle star, shown in repetitive flash photographs, pulls itself 

 along with its two anterior arms and shoves with the other three. It is far more agile 

 and flexible than its sluggish, stiff-armed cousin, the common starfish. (Fritz Goro— 

 Courtesy LIFE Magazine. Copr. 1955 Time Inc.) 



