151 
generation of the lamprey, the conger eel, &c. 
Fig. 6. A front view of the animal’s head ; magnified four 
diameters. 
A. External jaw. 
B. Middle jaw 
C. Internal jaw. 
Fig. 7. Side view of the same ; magnified four diameters. 
Fig. 8. One of the tentacula ; magnified four diameters. 
Fig. 9. The penis ; magnified four diameters. 
Fig. 10. A small portion of the eggs which are accumu- 
lating under the external integuments of the animal ; mag- 
nified fifty diameters. 
Fig. 11. A small portion of the fibrous substance and eggs 
from within the pedicle ; magnified fifty diameters. 
Fig. 12. Some separate eggs; magnified one hundred 
diameters. 
Fig. 13. The membrane lining the shell at the base of the 
pedicle, and of which the mantle is a continuation ; magnified 
two diameters. 
Fig. 14- One of the outer jaws seen in fig. 6 . 
B. The middle jaw. 
C. Internal jaw. 
From the Press of 
W. NICOL, 
Cleveland-row, St. James’s, Londrn. 
