MARINE EDITION oi the common sow-bug is 

 this isopod, Pentidotea resecata. 



FRESH-WATER crustacean from the Galapa- 

 gos, a phyllopod found in shallow pools. 



CALCAREOUS ALGA which forms pink mossy 

 mats on surf-beaten rocks is called Corallina. 



CORALLINA has hard limy joints as shown in 

 this impressive macrophotograph. 



