eu Cuticula. 

 ec Ectoderm. 

 en Endoderm. 

 g Generative organs. 

 h Mesenteries. 

 im Intermediary layer, 

 m Muscle-fibres. 



PLATE 1. 



The lettering is the same iB all the figures. 



me Mesogloea. 



Tus^ Upper circular muscle, 

 jns* Lower circular muscle. 

 Ova. 



r Marginal spherules. 

 sr Siphonoglyphe (oesophageal groove), 

 t Tentacles. 



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



Fig. 1. Zoanthus dancB. 

 \: Fig. 2. Epizoanthus elongatus. 



Fig. 3. Epizoanthus thalamophilus. 



Fig. 4. Epizoanthus stellaris. 



Fig. 5. Corticifera tuberculosa. 



Fig. 6. Corticifera lutea. 



Fig. 7. Palythoa anguicoma. 



Fig. 8. Amphianthus ornatum ; x 4. 



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

 stomatodeeum. 



Fig. 10. Aulorchis paradoxa; siphonoglyphe, stomatodseum, oral disc, and 

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



Fig. 11. Sphenopus pedunculatus. 



Fig. 12. Zoanthus confertus. 



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

 . Fig. 14. Stephanidium schulzii ; x 30. 



Fig. 15. Epizoanthus cancrisocius. 



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



