52 



GUIDE TO THE CORAL GALLERY. 



Case 4. smaller dactylopores, can be seen scattered over the surface of these 



corals. A section shows in the cavities of the calicles series of 



Fig. 13. 



Antennularia antenruna. A. Natural size. b. Joint of stem with brauchleU luagui- 

 lied; m, polyp; b, uematophore ; c, reproductive capsule, c. Branclilet highh 

 magnified (lettering as before). (After Allman.) 



parallel floors (tabulae) marking successive stages of growth activity. 

 MUlepora is richly provided with thread-cells, which retain their 



