XU DESCRIPTION OP PLATES. 



Plate XI. 



Diagrams illustrative of structure of Sea Anemones. 



1. Section through Actinia (after Green). 



2. Septum of 8. parasitica (A, Rondeletii) (after Hert- 



wig). 



3. Diagram showing arrangement of septa in base of 



A. equina (mesembryanthemum)^ from Journal of 

 Queckett Club, vol. v., plate xi. 



4. Section through tentacle of Anemonia sulcata {A. 



cereus) (after Hertwig). 



5. Thread-cells or nematocysts (after Hertwig). 



For descriptions of these figures, see chapter on 

 Zoantharian Structure, pp. 136 — 145. 



Plate XII. 



1. Actinoloba dianthus, p. 148. 



2. Heliactis bellis, p. 149. 



3. Heliactis venusta, p. 151. 



4. Tentacle of Cylista undata, p. 155. 



Plate XIII. 



1. Adamsia Rondeletii, p. 158. 



2. Cylista viduata, p. 156. 



3. Aiptasia Couchii, p. 159. 



Plate XIV. 



1. Actinia equina (mesembryanthemum), p. 163. 



2. Tealia crassicornis, p. 170. 



