LIST OF PLATES. XV 



PLATE XI. 



1. Hermit Crab (Pagurus Bernhardus) in a sliell of tlie Whelk, 

 surmounted by an Anemone {Sagartia parasitica), and studded 

 by Balani. 2. The same withdrawn. 3. The same in a shell of 

 the Periwinkle. 



PLATE XII. 



The common Prawn {Palcemon serratus). 



PLATE XIII. 



Ascidians (Ascidia hyalina) in a '^e3iyfeedi{Phyllophora ruhens). 



PLATE XIV. 



Naked-gilled Mollusca. 1. Eolis coronata. 2. Gills of 

 the same. 3. Doris Jlammea. 4. Gills of the same. 5. Ten- 

 tacle of the same. 6. JEolis despecta. 7. Eumenis marmorata. 

 8. Spawn ribbon. « 



PLATE XV. 



Young Flounders {Platessa vulgaris). 



PLATE XVI. 



1. Mudfish of the Gambia {Lepidosiren anTiectans). 2. Case 

 in which it was enclosed for six months, within a ball of clay. 



PLATE XVII. 



Stae-fish. L Uraster ruhem, which, having lost two limbs. 



