Natural Science, vol. vii. 



[Plate YU. 



COELENTERA. 



Figs. I and 2. Millepora nodosa. Esper : i. Portion of hard skeleton, 

 twice nat. size ; 2. system of zooids expanded (the five mouthless dactylo- 

 zooids bring food to the single gastrozooid in the centre). 



Fig. 3. Periphylla viirabilis, Haeckel ; New Zealand ; half nat. size. 



