128 



Echinoderma. 



or to some foreign object, by a stalk arising from the middle of 

 the dorsal surface. The actual body is small in comparison with 

 the whole size of the animal, usually soft and flat on the up-turned 



Fig. S3. 



Pig. 82 



Fig. 82. Whiaocnnus lofotensis. 



Pig. 83. AnteAon. 



Fig. 84. The up-turned surface (Tentral side) of Antedon ; the ten arms are out away 

 not far from their bases. <t anus, at the tip of a papilla ; / furrow, m mouth, y pinnule. 

 — Orig. 



ventral surface (or oral pole), firm and arched on the dorsal side. 

 From the margin of the body arises a number of arms, usually five 

 or ten, which divide frequentlj', sometimes repeatedly. A series of 

 lateral branches or pinnules arises on either side of the arms, 



