94 PROCEEDINGS OF THE NATIONAL MUSEUM. 



mostly lumbars (Cat. No. 8981); two sacra; five damaged ossa in- 

 nominata; and many limb bones, mostly broken. Some of these 

 bones belong possibly to another sf)ecies, as yet undetermined. 



In studying the teeth and the parts of the slaill at hand compari- 

 sons have been made with many skulls in the collection of the United 

 States National Museum. No differences are found in either the 

 size or the structure of the teeth. The front end of the zygoma of 

 the fossil appears to be rather broader and smoother than in L. ameii- 

 canus virginianus. The lower jaw seems to be more massive than 

 in the species just named. Also, the distance between the tooth row 

 and the hinder face of the incisor in the fossil appears to be greater 

 relatively to the tooth row, and the jaw deeper, than in most large 

 specimens of the recent skulls; but specimens of the latter are met 

 with which appear to bridge over the differences. 



According to G. S. Miller^ the subspecies virginianus extends its 

 range southward into the mountains of West Virginia and Virginia. 

 It is possible that the Whitesburg remains belong to a distinct sub- 

 species of L. americanus^ or even to a distinct species. 



UKSUS FLORIDANUS C. H. Merriam. 



Plate 3, figs. 17-20. 

 In the Whitesburg collection are several teeth and a much-gnawed 

 fragment of a right ramus of the lower jaw (Cat. No. 8992) of a 

 bear which on comparison with specimens in the United States 

 National Museum are referred to Ursus floridanus. One tooth is a 

 lower right third incisor (Cat. No. 8993), the breadth of which is 

 7.5 mm. An upper right canine (Cat. No. 8994) had been worn 

 down nearly to the base of the crown. The root is flat and measures 

 22 mm. from front to rear and 12 mm. transversely at the hinder 

 border. Crowns of two other upper, little worn, canines are present 

 (Cat. Nos. 8993, 8995). Of two lower right first molars (Cat. Nos. 

 8993, 8995), one (pi. 3, fig. 17) is little worn, and presents both roots. 

 The other offers only the front end of the enamel cap of an uncut 

 tooth. The first of these molars is 22 mm. long and 14 mm. wide. A 

 first molar of the left side (pi. 3, fig. 18) is 22.5 mm. long and 14 

 mm. wide. Two upper left hindermost molars (Cat. Nos. 8993, 8995) 

 had not yet come into use and the hinder edge of each is missing, 

 apparently gnawed off by rodents. The length of No. 8993 (pi. 3, 

 fig. 19) was close to 27 mm. ; the width in front 16.4 mm. In a recent 

 tooth of this species the length is 27 mm.; the width 15 mm. In the 

 other upper hindermost tooth (Cat. No. 8995; pi. 3, fig. 20) the pre- 

 served length is 24 mm. ; the width is 15 mm. Besides the lower in- 

 cisor tooth mentioned there are present, of lower teeth, the hinder 

 end of the right first molar (Cat. No. 8993) ; the right and the left 



'Bull. 79, U. S. Nat. Mus., 1912, p. 348. 



