128 



EXPLANATION OF PLATES. 



Plate I. 



Fig. I. Spliciiotroclins i^ilclin'sti. 

 ((() View of calicle X 3. 



(/)) Edge of the calicle, showing the exsert ends of tlie Septa, 

 (^c) The ridges on the sides of the corallum. 

 (</) Side view of corallum in (rr) X I2. 

 (e — g) Side views of other coralla X i- 



Fig. 2. Trochocyathus niwsonii. 

 (d) View of calicle X 2. 

 (6) Side view of corallum of (d) X i. 



P'iG. 3. Cai'vophyllia cpithccata. 

 (a) View of calicle X 2. 

 (fo) Side view of corallum of [a] X i- 

 (c and d) Side views of ether coralla X i- 



Fig. 4. Caryophyllia capensis. 



(a') View of calicle X 2^. 



(ft) Side view of corallum of (u) X i 



(c) View of another calicle X 2. 



(d) Side view of corallum of (c) X i- 



Fig. 5. Ccnitotivclins Joliiisoiii. 



((7) View of calicle X 2. 



(/)) Side view of corallum of (a) X i. 



(c) Side view of another corallum X i- 



ViG. 6. Dn Ilea II in Ctipcnsis. 



(tr) View of calicle X 2. 



(ft) Side view of corallum of (a) X i. 



(c) Side view of upper edges of three septa of cycles I., III. and IV. 



