PLATE CXV. 
Fig. 
1. Bispira volutacornis, Montagu. Lateral view of body, from Plymouth. Enlarged 
under a lens. ; 
la. Dorsal view of anterior end. Knlarged under a lens. 
1b. Lateral view of the same region. Hnlarged under a lens. 
lc. Pale young example. EKnlarged under a lens. 
2. Branchiomma vesiculosum, Montagu, from Plymouth. Enlarged under a lens. 
2a. Tube of the foregoing. Enlarged under a lens. 
3. Oria Armandi, Claparéde, from the ventral surface. Enlarged. 
4. Amphiglena mediterranea, Leydig, from the dorsal surface, showing the eyes. 
Enlarged. 3 
Or 
Trichobranchus glacialis, Malmgren. Dorsum in life. Lochmaddy, North Uist. 
Enlarged under a lens. 
5a. Lateral view of a spirit-preparation from St. Magnus Bay, Shetland. Enlarged 
under a lens. 
6. Tube of Protula tubularia, Montagu, from Shetland, with an <Actinia attached. 
Shehtly enlarged. 
