ASTERIAS 



ECHINODERMATA. 



1. Asterias. Sketch of the entire animal, from the ambulacral side. Mouth; ambulacra, with 

 tube-feet ; ocelli ; spines fringing the ambulacral groove : with a lens observe large pedicellarise situated 

 on these spines. 



2. Dorsal view of same. Madreporic plate ; arms of the trivium ; arms of the bivium. 

 In live specimens notice the dermal branchiae. 



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85 



