WCTTTRE OF BTAli 17- 1!. 





each sac i>- bound down by two retractor > the 



m r i < 1 ^r • - h . impullfl 



also Fig. 88). The atom be limil 



a tin- two not distim I intestine suddenly ■ 



and ends in a tniuute rectum situated in an ai 

 five fleshy ridges radiating from the centre of the di>k. Appended 

 to the intestine are the " coeca" or " liver" (1 



two long, tree like- masses formed of dense bran from four to 



six pear shaped follicles connecting by a short duct with the nrniu 



I Id Diagram of the water-system ••!" a star-fish. o. madreporic body b, 

 stone canal; c. circumoral water-tube; •/. radial water-tut i 

 feet <>r ambulacra. After 



The two main ducts unite to form a short common opening 

 into the intestine. The lire usually <i:irk, livid preen, and 



secrete a bitter digestive fluid, n ting probably tb ■:" the 



higher auim 



The ovaries I are long racemose bodies lying along i 



side of the interior of the arm?, and the 1 to pass out by 



Bhovt narrow oviduct (< p) through an openii - 



each side of th< base of the arms, the openii small and liitli- 



cult to detect. 



The water-vascular system consists of the madreporic body, the 

 ■• stone-canal " (Fig. 87, t\ the ring or circumoral canal I w), and I 



