IN TEE COCOS-KEELINa ISLANDS. 47 



which the apex, 1 millim. long, is undifferentiated and bears no calicles. 

 The same law is followed in the pi-ocess of repair exhibited by a broken 

 stump of a branch on the larger specimen. The wide angle of Isifurcation 

 of the branches causes the colony to assume a low decumbent form, and 

 bringing, as it does, neighbouring branches into juxtapositipn, gives rise 

 1o anastomoses ; the branching in various planes gives it a broad top. 



Eoliiriopoio lamcllosa, Esp. 



Muntipora digitatn, Dana. Inside the reef. 



sp. near expansa, Dana. 

 Porites lajvis, Dana. (>) Outside the reef. 

 Pavoijia lata, Dana. Inside the reef. 

 Pocillopora brevicornis. Lam. Inside tlie reef, 

 elegans (?) Dana. Outside the reef. 



