230 UKSID^. 



Mus. vii. p. 338, t. 18. f. 7, t. 21. f. 1-3 ; Oss. Fosi. v. p. 318, t. 22. 



f. 5, 6, t. 23. f. 1 ; JF". Cuvier, Mamtn. lAJiogr. t. ; tocher, Syn. 



Mamm. p. 145 ; Baird, Mamm. N. A. p. 225, t. 43. f. 10-13 (skuU) ; 



Gray, Cat. Mamm. B. M. p. 72 ; Be Blainv. Ostiogr. Ursus, p. 20, 



t. 5 (skull of adult and young), 1. 11 (bones), 1. 12 (teeth) ; P. Z. 8. 



1859, p. 477 ; 1860, pp. 130, 180, 417 ; Gray, P. Z. S. 1864, p. 692. 

 Ursus niger americanus, Schinz, Syn. Mamm. p. 301. 

 Ours gulaire, /. Oeoff. Mm. Paris. 

 Black Bear, Penn. 



Hob. North America. 



Mr. Bartlett notices the two hybrids, believed to be from a male 

 Ursus americanus and a female U. aretos (P. Z. S. 1860, p. 130). 



The series of pkulls of North- American Bears in the British Mu- 

 seum offers a very considerable amount of variation : in some the 

 nose and forehead are nearly on the same plane ; that is to say, 

 there is very little depression in front of the orbits ; but in others 

 the depression is more decided ; and in the skull of the Cinnamon 

 Bear it is as great as in the usual form of the European Bears. The 

 , greater number of the skulls have the forehead and front of the 

 crown more or less convex, sometimes decidedly so ; but in a few 

 the forehead is nearly flat. 



SkoUs. 



"3 Jri 





r^ to 









eo o 



217 c. 

 217 A. 

 217 ;. 



in. 1. 



1 1 



11 



1 



in. 1. 



10 6 



10 6 



9 3 



1. 

 2 5i 

 2 Si 

 2 



in. 1. 

 2 11 



2 7 

 2 1 



4 11 



1 7 

 1 84 

 1 6 



in. 1. 



3 3 



3 7 



3 



1. 

 1 5 

 1 1 

 1 3 



The specimens Jc and I have the opening for the vessel of the palate 

 in front of the front edge of the upper tubercular tooth. In a skull 

 (i) in the British Museum it is opposite the middle of the tubercular 

 on one side, and opposite the front edge on the other. The specimen 

 k is from the western slope of the rocky mountains (Zorc?). 



The skull elongate. Nose rather produced, compressed on the 

 sides, rounded above ; nasal bones long, of the same length as the 

 upper part of the maxillae, and extending to a line level with the 

 middle of the orbits. Forehead convex, rounded, rather shelving 

 on the sides. The nose-aperture higher than broad, oblique. Orbits 

 small, oblong, longer than high. The zygomatic arch moderately 

 strong. The palate rather contracted at the line of the last tooth, 

 and more so behind towards the inner nasal opening, which is 

 rather narrow, with a transverse front edge, and with the sides 

 considerably longer than the width of the front edge. The tuber- 

 cular grinder large, broad, considerably longer than the flesh- tooth. 

 The outer cutting-teeth largest, lobed. The front false grinders 

 small, subequal, far apart. 



There is an adult skull in the Museum, received from the Zoolo- 



