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dentition. Two or perhaps three distinct species of this genus have been generally recognized, but the recent researches of Dr. Forsyth Major (cf. P. 2. S. 1897, p. 359) tend to show that we are by no means yet well acquainted with the species of this difficult group. The third genus of Suidæ, the Babirussa, remarkable for the peculiar shape of its four tusks, exists only in the far-away island of Celebes and (perhaps introduced) in the adjacent island of Bouru. It must, therefore, be attributed to the Oriental Region, to which, we believe, we have now definitely shown (see above, p. 146) that Celebes must be referred.
The fourth and last family of Swine-like Ungulates contains only the Peccaries (Dicotyles) of the New World. The two species belonging to this genus range from Texas and the Southern United States down to Patagonia; and must be regarded as purely Neotropical in their geographical classification, although one of the species—the Collar Peccary—undoubtedly intrudes slightly within the boundaries of the Nearctic Region.
SECTION XIV.-SUMMARY AND DEDUCTIONS
Table of the genera of the Order Ungulata with the numbers of species belonging to the great Zoological Regions.
ANTILOPINÆ. 15. Antilope 16. Æpyceros 17. Saiga 18. Pantholops 19. Antidorcas. 20. Gazella . 21. Ammodorcas 22. Lithocranius 23. Dorcotragus
HIPPOTRAGINÆ. 24. Hippotragus 25. Oryx. 26. Addax
TRAGELAPHINÆ. 27. Boselaphus 28. Tragelaphus 29. Strepsiceros 30. Orias
RUPICAPRINÆ. 31. Rupicapra. 32. Cemas 33. Nemorhedus 34. Haplocerus 35. Budorcas
FAMILY V. ANTILOCAPRIDÆ. 1. Antilocapra
GIRAFFIDÆ. 1. Giraffa.
(b) MOSCHINÆ. 11. Moschus