eu Cuticula. 

 ec Ectojerni. 

 en Endoderni. 



<7 Generative organs. 



h Mesenteries. 

 im Intermediary layer. 

 m Muscle-fibres. 



PLATE I. 



The lettering is the same in all the figures. 



mt Mesogloea. 



m.s' Upper circular muscle, 

 ms^ Lower circular muscle. 



Ova. 



r Marginal spherules. 

 ^ Siphonoglyphe (oesophageal groove). 



t Tentacles. 



All statements given as to magnifying powers have reference to Zeiss's system. 



Fig. 1. Zoanthus dance. 



Fig. 2. Ejyizoanthus elongatus. 



Fig. 3. Epizoanthus thalamophilus. 



Fig. 4. Epizoanthus stellaris. 



Fig. 5. Cortidfera ttiberculosa. 



Fig. 6. Cortidfera lutea. 



Fig. 7. Palythoa ang^dcoma. 



Fig. 8. Ampkianthus ornatum ; x 4. 



Fig. 9. Aulorchis paradoxal genital tube exposed by splitting the lip and the 

 stomatodseum. 



Fig. 10. Atdordiis paradoxal siphonoglyphe, stomatodaeum, oral disc, and 

 mesenteries exposed on removal of about one-third of the animal. 



Fig. 11. Sphenopus p>eduncxdatus. 



Fig. 12. Zoanthus confertus. 



Fig. 13. Liponema multiporum I oral disc and stomatodseum evaginated. 



Fig. 14. Stephanidium schulzii I x 30. 



Fig. 15. Epizoanthus cancnsodus. 



(Figs. 1-7, 11, 12, 15 are after Erdmann.) 



