6 MAMMALIA. 



as two or four, and which have a more or less complicated stomach 

 with a moderate-sized simple caecum, as Ox, Hog, Peccary, and 

 Hippopotamus. 



II. Anisodactyle. " Hoofed quadrupeds with toes (on the hind 

 feet at least) in uneven number, as one, or three, or five, the latter 

 number being manifest in the Proboscidians. All these have a 

 simple stomach and an enormous caecum, as Horse, Tapir, Rhi- 

 noceros. 



III. Proboscidians. " Resembling the preceding in having toes 

 in uneven number, in having a comparatively simple stomach and 

 an enormous caecum, but combining with a long proboscis so 

 many other peculiarities of structure as to merit the rank of a 

 distinct group of Ungulata." 



In the Quarterly Journal of the Geological Society for 1848, 

 p. 131, with his usual fondness of renaming old groups, Mr. Owen 

 proposes to change the name he has given to the above group 

 to 1. Artiodactyla, 2. Perissodactyla, and 3. Proboscidia. 

 In this paper the recent genera are arranged in the following 

 order : 



I. ARTIODACTYLA. * Ruminantia. 1. Moschus. 2. Antilope. 

 3. Ovis. 4. Bos. 5. Cervus. 6. Camelopardalis. 7- Camelus. 

 ** Non- Ruminantia. 1. Hippopotamus. 9. Dicotyles. 10. Pha- 

 eochaerus. 11. Sus. 



II. PERISSODACTYLA. 12. Tapirus. 13. Equus. 14. Hy- 

 rax. 15. Rhinoceros. 



III. PROBOSCIDIA. 16. Elephas. 



This arrangement is only founded on the consideration of the 

 osteological conformation of the foot, and has the disadvantage of 

 most artificially separating a very natural group recognized by 

 Aristotle, Ray, Linnaeus, Illiger, Cuvier, and all recent authors, 

 between two divisions of the order. Cuvier, Fleming, Blainville 

 and others properly used the character here adopted to the whole 

 group for the division of the Pachydermata into subdivisions. 



Prince Charles Lucien Bonaparte (in his Prodromus Systematis 

 Mastozoologice, 1847) arranges these animals in four orders, 

 thus : 



Subclass I. EDUCABILIA. Ord. V. BELLU^E. Fam. 13. Ele- 

 phantidcB. Subfam. 23. Elephantina. 24. Rhinocerotina. 25. Hip- 

 popotamina. Fam. 14. Suidce. 26. Tapirina. 27. Suina. 28. 

 Anoplotherina. Fam. 15. Hyracidce. 29. Hyracina. Fam. 16. 

 Equidce. 30. Equina. 



Order VI. PECORA. Fam. 1?. Camelida. 31. Camelina. 

 Fam. 18. Cervidce. 32. Moschina. 33. Cervina. Fam. 19. Came- 

 lopardalidcB. 34. Camelopardalina. Fam. 20. Bovid<e. 35. An- 

 tilopina. 36. Bovina. 



