336 PALEONTOLOGY 



Genus Dichobune. — The genus Dichobune (from hiya, bipar- 

 titus ; fiouvhg, collis) was proposed by Cuvier, in the second 

 edition of his Ossemens Fossilcs, 4to, torn, iii., 1822, p. 64, for the 

 Anoplothcrium minus of the original Memoir in the Annates 

 clu Museum, torn, iii., 1803, and for the A. leporinum of the 

 4to edition, 1822, tom.i., pi. 2, fig. 3 ; and torn, iii., pp. 70 and 

 251. It is closely allied to the anoplotherioid genus Xipho- 

 don ; the dental formula is the same, only there is a slight 

 interval between the canine and the first premolar in both 

 jaws ; the first three premolars are subcompressed, subtren- 

 chant, but less elongated from behind forwards than in Xipho- 

 don. Besides the two normally-developed and functional 

 digits on each foot, there may be one, sometimes two, small 

 supplemental digits. 



The best illustration of the structure of the upper true 

 molars is afforded by the figure of one of these teeth in the 

 Proceedings of the Geological Society, May 20, 1846, published 

 in the Quarterly Journal, vol. ii., p. 420. " The anoplotherian 

 character of the tooth is shown by the large size of the lobe 

 Op, x, fig. 1), and the subgeneric peculiarity by the continua- 

 tion of its dentinal base with that of the inner and anterior 

 lobe (id), at the early stage of attrition presented by the crown 

 of the tooth in question. In the large and typical Anoplo- 

 theria, the lobe (p) preserves its insular form and uninterrupted 

 contour of enamel until the crown is much more worn down 

 than in the present tooth (fig. l). In this respect, as in the 

 modifications of the lower molar teeth, the genus Dichobune 

 shows its closer affinity to the true Ruminants ; but the little 

 fold of enamel dividing the lobe id from p distinguishes the 

 upper molar tooth in question from that of any Ruminant." 

 (P. 421.) 



A new and interesting species of this genus, called Dicho- 

 bune ovina, has been founded upon an nlmost entire lower jaw 

 with the permanent dental series, wanting only the four middle 



