134 UNGTIL4TA. 



22017 b. The well-worn second right lower true molar ; from 

 Grays. This is a very characteristic specimen of the 

 narrow-crowned variety. Purchased, 1848. 



22017 a. A very similar specimen of the homologous tooth of the 

 opposite side ; from Grays. Purchased, 1848. 



M. 2549 b. An imperfect second lower true molar ; from Barrington. 



Purchased, 1885. 



18966 a. Fragment of a much-worn second (?) lower true molar ; 

 from Grays. Five ridges remain, which are unusually 

 broad. Purchased, 1845. 



31318. The second left lower true molar, in a half-worn and some- 

 what imperfect condition ; from Grays. There are twelve 

 ridges. Purchased, 1847. 



27906. The second left lower true molar, in an early stage of wear ; 

 from Clacton. Presented by John Brown, Esq., 1852. 



42349. Hinder portion of the partially-worn second right lower 

 true molar ; from the Pleistocene of the Thames Valley. 

 Noticed by Leith-Adams, op. cit. p. 33. Purchased, 1870. 



27908. The associated right and left third lower true molars, in a 

 half-worn condition, and wanting some of the hinder 

 ridges ; from the Pleistocene of St. Mary's Stoke, near 

 Ipswich, Suffolk. These specimens, which belong to the 

 broad- crowned variety, are noticed by Leith-Adams, 

 op. cit. p. 38, where they are erroneously stated to be 

 implanted in the mandible. 



Presented by John Brown, Esq., 1852. 



47119. The associated right and left third lower true molars, in a 

 (Fig.) comparatively early stage of wear and wanting some of 

 the hinder ridges ; from the Forest-bed of Cromer, Norfolk. 

 Described and (one) figured by Leith-Adams, op. cit. p. 34, 

 pi. iii. figs. 1, 1 a. These specimens belong to tho thick- 

 ridged variety. Sharp Collection. Purchased, 1876. 



39464. Tho partially-worn third right lower true molar, with one 

 (Fig.) or more of the anterior ridges worn away ; from the 

 Pleistocene of Saffron Walden, Essex. Figured by Fal- 

 coner and Cautley in the ' Fauna Antiqua Sivalensis,' 

 pi. xiv. a. figs. 11, 11 a, and in ' Falconer's Palaeonto- 

 logical Memoirs,' vol. ii. pi. ix. figs. 3, 4. 



BoiverbanJc Collection . Purchased, 1865, 



