CRINOIDEA 



63 



Fig. 4S. — Crinoid {Podac'rinus), half natural size. (Brehm.) 



O^ 



~)V^*^f "•^■^'^.^ c 



^M 



Fig. 49. — Mouth area of a crinoid {Comafula), showing the course of the 

 intestine leading from the mouth {m) to the vent (a); g, grooves leading 

 from arms to mouth. (From Kingsley's " Comparative Zoology," Henry 

 Holt and Co., FubHshers.) 



Digestive System. — The mouth is directed upward and leads 

 into the digestive tract, consisting of esophagus, stomach, and 



