ALCYONARIA. 167 
Examples :— 
Antipathes (arborescent). 
Cirripathes (whip-like). 
Leiopathes (with twelve mesenteries). 
Dendrobrachia (with eight pinnate retractile 
tentacles). : 
ALCYONARIA 
In the Alcyonarian polyp there are al- 
ways eight fzmmate tentacles and eight 
mesenteries attached to the stomodzum 
or gullet. There is one longitudinal 
at 
Fic. 84.—Diagrams of Types of Alcyonaria.—After Hickson. 
Types of Alcyonaria :—I. Of Stolonifera ; II. of Aleyonacea; III. of Axifera; 
IV. of Stelechotokea. 
ciliated groove (siphonoglyphe or sz/cus) in the stomodzeum 
