SOME OTHER LITTLE SEA-CREATURES. 157 



lemon-yellow, others white with red spots, and 

 others a beautiful blue with brown trimmings. 

 When put into water they expand their gills and 

 ruffles, and show their beauty to great advantage. 



Sometimes you can find them strangely creep- 

 ing on the surface of the water, with their bodies 

 hanging downward, so that they really are walk- 

 ing on air. 



These are some of the most common creatures 

 that you will find in the sea. But you may ex- 

 pect also to find many others that are not men- 

 tioned in this book. Remember that each 

 creature must have its own means of getting food 

 and breath and of defending itself from its ene- 

 mies. In each case, try to find out what these 

 are. 



BLACKBOARD WORDS. 



Hydroid (hi'droid), Tunicate (tu'ni-kat), Ascidiaii (as- 

 sid'i-an), troublesome (trub'1-siim), polyp (pol'ip), trans- 

 parent (trans-par'ent), leathery (leth'er-y)o 



