229 



PLATE III. 



Fig. 1. Nemertes Borlasii. 



2. Sabella Voluticornis. 



3. Sand Tube of Terebella Conchilega. 



PLATE IV. 



Fig. 1 . Stnapta digitata ; a, separating and throwing out capsul- 

 iferous threads, 

 2. Thalassema Neptuni. 



PLATE V. 



Fig. 1. Balanophyll^a Eegia, expanded; «, contracted ; 6, coral; 

 c, same tentacle enlarged. 



2. Cartophtll^a Smithii, partly expanded; a, section of 



bony plates ; h, tentacle, 



3. Sagartia Anguicoma, closed ; a, basal disk showing radiat- 



ing septa, 



4. Synapta Digitata, see Plate IV. ; a, h, fingered tentacles, 



enlarged; c, spiculse; d, anchor lying on its transparent 

 anchor plate. 



5. S, ViTTATA ; perforated anchor plate ; a, spicula. 



PLATE VI. 



Fig. 1. Actinia Mesembryanthemum partly expanded : a, closed. 



2. BuNODES Crassicornis, 



3, Caryophyll^a Smithii. 



PLATE VII. 



Fig. 1. Echinus Miliaris, creeping over Modiola barbata. 



2. „ „ creeping up the glass. 



3. „ „ hiding under stone. 



