. Annual report of the Board of Regents of the Smithsonian Institution . EVOLUTION OF THE ELEPHANT—LULL. 669. 670 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1908. ing those of the lower jaw. This genus is reported from the Pliocene(Blanco) of Texas and Mexico and ranges as far south as BuenosAires in the southern hemisphere. Two South American species areknown to us, one D. andium^ following the chain of the Andes as farsouth as Chile. This tyjDe is often found at great altitudes, a speci-men from the Quito Valley in Ecuador, now in the Yale collection,having been found 10,000 feet above the level
. Annual report of the Board of Regents of the Smithsonian Institution . EVOLUTION OF THE ELEPHANT—LULL. 669. 670 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1908. ing those of the lower jaw. This genus is reported from the Pliocene(Blanco) of Texas and Mexico and ranges as far south as BuenosAires in the southern hemisphere. Two South American species areknown to us, one D. andium^ following the chain of the Andes as farsouth as Chile. This tyjDe is often found at great altitudes, a speci-men from the Quito Valley in Ecuador, now in the Yale collection,having been found 10,000 feet above the level of the sea. Dibelodon hiimholdii was a dweller on the plains, being found inthe pampas formation near Buenos Aires, while Darwin records italong the banks of the Parana River in Argentina, and Wallacereports the same species among other remains in a limestone cavernnear the headwaters of the San Francisco Eiver in southern Jmmholdii^ like D. andium, has its origin in the Texas Pliocene,the line of migrations nearly paralleling, the one along the tropicalplains, the other along the Andine jDlat
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