12 



tooth of the Ursus spel&us. The jaw of the Ursus prisons is relatively 

 of less depth below the third and fourth grinders, in comparison with the 

 size of those teeth, than in a Polar Bear of similar size; which, like the 

 Ursus prisons, retains the small spurious molar immediately behind the 

 canine. The third molar is one-half larger than in the Polar Bear, 

 whilst the interspace between the first and second molars in the Ursus 

 prisons is little more than half that in the Ursus maritimus. The anterior 

 margin of the symphysis is more sloping in the U maritimus than in the 

 Ursus prisons. 



This specimen, which is marked 'r. 18' in the original Hunterian Ca- 

 talogue of Fossils, is stated to be from Germany. 



38. A portion of the posterior part of the left ramus of the lower jaw of a 

 Bear, containing the three posterior molar teeth ; the last molar is rela- 

 tively narrower than in the Ursus spelceus, and the longitudinal depres- 

 sion beneath the external alveolar wall is more marked than in the Ursus 

 spelasus. The worn surface of the teeth, the strong muscular impressions 

 and the high coronoid process, indicate this fragment to have belonged 

 to an old male specimen. It is more petrified than is usual in the cave 

 fossils. This specimen is 'p. 11' in the Hunterian Catalogue of Fossils, 

 but the locality from which it was obtained is not given. 



39. The left upper canine of a small individual or species of Cave Bear ; pro- 



bably of the Ursus prisons. 



40. The right inferior canine of a small individual or species of Cave Bear. 



41. The canine of a Bear. From the limestone cavern at Oreston, discovered 

 in 1820*. Presented by Joseph JVhidbey , Esq., Civil Engineer. 



* This and the preceding fossils of the Bear from Oreston are mentioned in the paper by Joseph 

 Whidbey, Esq., Civil Engineer, in the Philosophical Transactions for 1821. They were found asso- 

 ciated with the tooth of a Rhinoceros and some bones of a large Ruminant in a cavern in the lime- 

 stone quarries, which is described as follows: — " These bones were lately found in a cavern one foot 

 high, eighteen feet wide, and twenty feet long, lying on a thin bed of dry clay at the bottom ; the ca- 

 vern was entirely surrounded by compact limestone rock, about eight feet above high-water mark, 

 fifty-five feet below the surface of the rock, one hundred and seventy-four yards from the original 

 face of the quarries, and about one hundred and twenty yards, in that direction, from the spot where 

 the former bones (those of a Rhinoceros) were found in 1816." 



