COKALS. 



Lesson I. 



A single large speoimen o{ Galaxea (Fig. 1) or some other ooral 

 with large tabes, will furnish every child in a class with a tabe for 

 stndy, while the teacher ahonld have a piece consisting of three or 

 foar tubes, and if possible, one or two smaller ones jast budding 

 oat. Thoogh Oalaxea is best, still no teacher need omit the lesson, 

 if she can obtain pieces of the common madrepore or finger-coral 

 (Fig. 2). Bat if this is used, each child should have the end of 

 a branch showing the large polyp at the tip, and a group of little 

 ones aroand it. A living sea-anemone in the schoolroom will be 

 a great help. Blackboard drawings of budding hydres should also 

 be kept for the lesBon. 



Fig. 1. 



FlQ. 2. 



The children have become familiar with the idea of the 

 skeleton in the sponge, so they at once see that coral is 

 only the skeleton of the coral animal, and that each tube 

 is made by one animal. They quickly make the follow- 

 ing observations : 



It is white. It is shaped like a tube. It has lines on 

 the outside. It has little walls on the inside. It is hard 

 like stone. 



