EXPLANATION OF THE PLATES. 
265 
Plate XI. 
The specimens from 1 to 29, inclusive, are all from Kirkdale. 
1. Lower jaw of a water-rat. 
2. Lower incisor tooth of No. 1. 
3. Upper incisor of water-rat. 
4. Anterior molar tooth of lower jaw of water-rat. 
5. No. 4, magnified. 
6. Crown of No. 4, magnified. 
7. Jaw of a mouse. 
8 and 9. Teeth of No. 7, magnified four times. 
10. Anterior molar tooth of the upper jaw of a rabbit. 
11. Os innominatum of a young water-rat. 
12. Tibia of a water-rat. 
13. Lower epiphysis of femur of water-rat, twice magnified. 
14. Femur of water-rat, twice magnified. 
15. Ulna of water-rat. 
16. Tail vertebra of water-rat. 
17. Anterior extremity of No. 16. 
18. Posterior extremity of No. 16. 
19. Eight ulna of a raven; anterior extremity. 
20. Outside view of No. 19, showing the points of attachment of 
the quill feathers. 
21. Right ulna of a raven, showing the other extremity of 
No. 19. 
22. 23. Other views of No. 20, showing the cavity to be nearly 
filled with stalagmite. 
24. Right ulna of a lark, showing the attachments of the quill 
feathers. 
25. Inside view of No. 24. 
26. Left ulna of a very large species of pigeon. 
