20 Lessons in Zoology. 



ding from some of the tubes. There is flesh covering the 

 stony skeleton between the tubes. 



It is easy now to understand that the spongy filling be- 

 tween the tubes of Galaxea is formed by the layer of flesh 

 that covers it, and connects the animals. A colony of 

 Galaxea is formed by the budding of young animals from 

 this connecting layer, around the base of the old ones. 



Fig. 4 is a cross section of the body of a living ooral, bnt does not 

 show the stomach. It represents what we should see if we were to 

 out off the npper half of the tnbe and then look down npou what 

 was left. For the blackboard the nnahaded parts shonld be drawn 

 in red, to represent flesh, and the shaded parts in white, for the 

 stony skeleton. The children now tell what they see in this fignre : 



There's a tube of flesh outside of the tube of stone. 

 There are fleshy partitions and stony ones. The fleshy 

 partitions are in pairs, and the stony ones are not. There 

 are six pairs of long, fleshy partitions, and six pairs of 

 short ones. There are six long stony partitions, and six 

 short ones. There is a tube of flesh inside the stony tube, 

 and the fleshy partitions grow out from that. 



The stony partitions are not formed by the jleshy ones, but grow in 

 folds of the fleshy tube, that arise from its base between the fleshy parti- 

 tions. 



Lessom' II. 



The same specimens are needed as for the last lesson, with 

 finger-coral besides. 



Beview by asking what the coral has that the sea- 

 anemone has, then what the coral has that the sea-anemone 

 has Tiot. This comparison will bring out from some 

 bright child the observation, " Why, the coral is just like 

 a little sea-anemone with a skeleton ! " This is exactly 

 what we wish to find out, and the children will see it 



