Plate VII. 
Fir/. 1. Oral disk of Edtvardsia Allmanni , M‘I., completely contracted. 
Enlarged. 
Fig. 2. The same, with the tentacles partially expanded. 
Fit/. 3. Anterior portion of the sheath and pouting rim of the mouth. 
Mewed laterally. 
Fig. 4. A single tentacle. Enlarged. 
Fig. 5. View of the posterior part of Edwardsia Goodsiri, M‘I., showing 
the “ blown-bladder ” aspect. 
Fig. 6. The oral disk with expanded tentacles. 
Fig. 7. A single tentacle. Enlarged. 
Fig. 8. An entire colony of Alcyonium digitatum, L., with the polyps in 
varying degTees of expansion. 
Fig. 9. External view of a polyp on a level with its cell. 
Fig. 10. The same, more expanded. 
Fig. 11. A polyp half-expanded. 
Fig. 12. A polyp of the same, much attenuated, showing the minute 
spicula and the somewhat fusiform aspect of the expanded 
arms. 
Fig. 13. Doris repanda, A. & II., in process of spawning : a, the dimple 
of the foot. The arrow marks the direction of its turning. 
Seen through a glass vessel. 
Fig. 14. The same, in another position, with the cloak much folded. 
Fig. 15. Spawn of the foregoing. The single interrupted chain of ova 
appended thereto is exceptional. 
Fig. 16. A scolex of Tetrarhynchus from the stomach of Cancer pagurus, 
encysted. Probably from the debris of fishes eaten by the 
crab. X about 60 diameters. 
Fig. 17. The same, separated from the sheath and somewhat compressed. 
X 65 diam. 
Fig. 18. Echinorhynchus stnnnosus, Rud., from the intestine of a common 
seal (Phoca vitulina ) caught at St. Andrews, x 60 diam. 
