XIU 



LIST OF PLATES, 



PLATE I. 



Fig. 1. Group of Serpula contortupUcata. 2. Case of Tere- 

 hellum concMlega, formed of shells, pebbles, and sand. 3. "Worm 

 withdrawn from case. 



PLATE II. 



Amplntrite JEgeana. 1. In its transparent case (reduced). 

 2. Worm out of its case. 3. Head expanded. 4. Head closed. 



PLATE III. 



Corals. 1. Skeleton of i^?<?2^m, or Mushroom Coral. 2. Ca- 

 ryophyllea Smithii, animal expanded. 3. The animal closed. 

 4. Compound specimen. 5. Dissected skeleton. 6. Tentacles. 

 7. Oculina prolifera. 



PLATE IV. 



1. Edwardsia vestita, clothed with its leathery coat. 2. Ed- 

 wardsia withdrawn. 



