CATALOGUE 



OF 



PART II, 



Order UNGULATA. 



Suborder ARTIODACTYLA. 



Although in earlier works the writer has subdivided the fossil 

 Artiodactyla into sections, a more extended survey has convinced 

 him that any such divisions are at present impracticable, as all the 

 groups seein to pass more or less completely into one another. 



Family BOVID^l 1 . 



Dentition, usually : I. ^, C. j, Pm. |, M. ?. This and the next 

 two families, which, together with the Antilocapridce, constitute the 

 Pecora of recent Zoology, are characterized by the perfectly selenodont 

 structure of the true molars, of which each of the upper ones carries 

 four columns, by the coalescence of the third and fourth metapodials 

 into a ' cannon-bone,' and by the union of the cuboid and navicular 

 elements of the tarsus. It is not certain whether some of the fossil 

 genera ranged under the Tragulidce can be distinguished from this 

 group of families. 



1 Flower observes that " the [recent] generic divisions of this family are still 

 in an unsatisfactory state, and require careful and critical revision ; " adding 

 that many adopted in Part ii. of his ' Catalogue of the Mammalia in the Museum 

 of the Eoyal College of Surgeons ' (1884), " are founded on trivial characters 

 very difficult of definition." 



PABT II. B 



