URSUS. 



4G9 



Cashmeer Bear ! and U. ferox ; very different from Polar and Brown 

 Bears. In short diasteme most like the Cashmeer Bear. In proportions 

 of penultimate molar, most like U. spelceus. 



The premolars are very inconstant in number in all the Bears. In 

 Polar Bear, commonly in lower jaw p.m. 1 and 4. They seem to be 

 most common and constant in the American Black Bear. 



A specimen of Ursus spelceus, 1 said to be from Bacton (No. 16,448 

 Brit. Mus. Cat.), figured in the Brit. Fos. Mam., fig. 35, c, is a beautifully 

 perfect right ramus of the lower jaw, with the four last molars in situ. 

 The penultimate agrees with that of the Bear from Deborah's Den, in 

 its great width in proportion to its length, but the crown is more warty. 

 I doubt much the asserted origin of this specimen. It differs from all 

 the Bacton specimens that I have seen. It looks as if out of peat. 



A set of Bear's jaws from Kent's Hole, although not agreeing with 

 Ursus spelceus, are entirely different from the Deborah's Den specimen. 

 Except that the condyle is much shorter, they resemble the Grays 

 Thurrock specimens. This has the condyle enormously long, but the 

 penultimate is of the same size and form as in the Deborah's Den fossil. 



The Muggendorf skull of U. prisons has a small jaw, with a short 

 diasteme, and the condyle is somewhat like that of the Deborah's Den 

 fossil. 



[Figures of the lower jaw of fossil Ursus, from Deborah's Den, 

 are given in Plate XXXVI. The comparative measurements will be 

 found over the page. — Ed.] 



1 Dr. P. had at first great doubts 

 whether this Bacton jaw belonged to V. 

 spelceus, but after careful examination 



with M. Lartet, he came to the conclu- 

 sion that it did. — [Ed.] 



