III. CRINOIDEA. 



339 



Fio. 320. Pentacrinus macleayanus. (After Wyville Thompson.) 



FIG. 321. FIG. 322. 



FIG. 321. Adult of Antedon macronema. (After Carpenter.) 



FIG. 322. Different Pentacrinus stages (a, b, c) of Antedon rosacea. I, arms; 2, cim; 

 3, stalk. 



