62 MR. G. BUSK ON THE ANCIENT OR 
in Pl. V. figs. 4, 5, whilst that containing the second molar is shown separately in 
fig. 7. 
‘The specimen when put together exhibits the small angular crochet and a mere 
rudimentary wncinus, about half of the condyle, and a portion of the coronoid process, 
together with a part of the horizontal ramus containing the two hinder molars m. 2 
and m. 3 in beautiful condition. These teeth measure :— 
in. 
a a Pest Me tome L-OSG7 
Fe) Cae ee See mens oe eno eC aS 

5 
be 
The third molar is oblong with parallel sides, but constricted behind, chiefly on the 
inner side. There is no trace of a sulcus on the outer border (vide infra); and the 
surface is very faintly sculptured. 
6. The only other specimens connected with the dentition are two detached canines, 
both of comparatively small size, and resembling in general characters those of 
U. arctos. They measure -9x*55 and -9 x65 respectively. One is figured in Pl. V. 
fig. 6. 
Of the other parts of the skeleton those chiefly worth noticing are :— 
7. A nearly entire axis vertebra, wanting only the posterior epiphysis of the centrum 
(Pl. VI. figs. 7, 8, 9). The body, including the odontoid process, and allowing 01 
for the missing epiphysis, measures 2’°7 in antero-posterior length. The width from 
side to side across the anterior articular processes is 2’°6, and the length of the spine is 
also 26; the neural canal is 1-1 in diameter. The width from side to side at the 
posterior articular facets is nearly 2”°3. The width of the body at the narrowest part 
is 2”-0, and the entire height of the bone 21. 
8. The proximal half, or rather more, of the left ulna (Pl. V. fig. 1) of an old and 
apparently very muscular individual. The olecranon, measured in the antero-posterior 
direction from the upper point of the greater sigmoid cavity, is 2-6 wide, and the dis- 
tance from the same point to the point of the coronoid process 2-0. Thelength of 
the lesser sigmoid cavity is 1’"8. 
The corresponding measurements in an ulna of U. horribilis (ferox), Baird, from 
California, are 2-7, 2’°0, 1-8, or as nearly as possible the same. In another speci- 
men of the smaller variety of the Grizzly Bear (U. richardsoni, Baird), the dimensions 
are 2!-by i209, Ayso: 
9. The corresponding part of a second right ulna of a younger and less robust 
animal, but otherwise agreeing with the above. 
10. The proximal end of the right radius, which fits to the last-mentioned ulna, and 
no doubt belonged to the same skeleton. Its proximal articular head measures 1-7 x 
1-25, and the least circumference of the shaft is 2’°6. 
11. One of the most remarkable among the ursine remains consists of the nearly 
entire right tibia, with the upper end of the fibula attached above, by bony ankylosis, 
