QUATERNARY FAUNA OF GIBRALTAR. 91 
3. A left upper molar (m. 1, s). Pl. X. figs. 6, 7. 
4. A left upper second premolar (pm. 2, s). Pl. X. fig. 8. 
II. To the Trunk :— 
5. A nearly entire atlas. Pl. XVIII. figs. 1, 2. 
III. To the Anterior Extremity :— 
6. An entire naturally detached proximal epiphysis of the left humerus. Pl, XI. fig. 1. 
7. The head and a considerable part of the shaft of the right humerus of a fully 
mature animal. 
8. A fragment of the shaft of the opposite humerus, fully adult. 
9. A nearly entire left radius. Pl, XIV. figs. 1, 2. 
10. A perfect right os lunare. Pl. XV. figs. 4-8. 
11. The distal extremity of the third metacarpal. Pl. XVII. figs. 6-8. 
12-15. The distal extremities of four metacarpals differing somewhat in size. 
16. A second phalanx. Pl. XVI. fig. 9. 
IV. To the Hinder Extremity :— 
17. The nearly entire head and upper portion of the shaft of the right femur. 
Pls. XII., XIII. ; 
18. A detached right third trochanter, probably of the same femur. 
19. A nearly perfect right tibia of an immature animal, with the epiphyses ununited. 
Pl. XIV. figs. 3, 4. 
20. A crushed fragment of the middle of the shaft of a tibia. 
21, 22. Two right astragali, one of which is figured in Pl. XV. figs. 1-3. 
23, 24. An entire third right metatarsal with the proximal end of the corresponding 
fourth metatarsal in natural apposition. Pl. XVI. figs. 1-4. 
25, 26. The proximal half, or nearly so, of another third right metatarsal, and the 
corresponding entire fourth metatarsal apparently fitting to it; the latter is figured 
in Pl. VII. figs. 1-5. 
1. Head. 
As most of the more important of these specimens are represented of the natural 
size in the Plates accompanying the paper, it will be unnecessary to enter at any length 
into detailed descriptions of them. For the diagnosis of the species, however, to 
which they belong, it will be requisite to notice more particularly those which may be 
regarded as affording the best characters. Amongst these are, in the first place, the 
teeth. 
1. The most perfect is the right upper fourth premolar. (Pl. X. figs. 1-3.) 
The tooth, which is very little worn, measures 18 in the antero-posterior direction, 
