Plate III. 



Fit/. 1. Aplyaia punctata, Cut., in the contracted state. Somewhat 

 reduced. The great muscular lobe (epipodium) of the right 

 side has been folded downwards, so as to expose the shell ion 

 th.' l.'ft in the figure I. The purplish dye exuded by the animal 

 surrounds it. 



Wig. 2. Lamettaria perspicua, L. Slightly enlarged. 



Wig. ... Another specimen. About natural si/..*. 



Fig. 4. The same, slightly contracted. \ iewed from the under surface. 



Wig. 5. \ pale specimen of the same species. Slightly enlarged. 



Fig. b\ View of the under surface of the same. 



Wig. 7. Anterior view of another small specimen, showing the foot and 

 cloak. 



Wigs. i,9& LO Figures showing th>' great variability of colour in this 

 species. 



Wig, II. Lateral view of Lucernaria auricula, 0. Fabr., attached to a 

 piece of Fucus serratus. Enlarged under a lens. The pah' 

 streak on the pedicle indicates one of the longitudinal muscles. 



Wig. 12. View of the same expanded, and scon from abo\e. Similarly 

 enlarged. Running inwards from each bundle of tentacles an 



the orange reproductive organs. One of the border papillae is 

 double; and various urticating organs are scattered over the 

 bell. 



