. Annual report of the Board of Regents of the Smithsonian Institution . covering of cement was ex-tremely thick. Elephas iinperator was ofgreat size, 13^ feet in height atthe shoulder, and the huge,spiral tusks measured 13 feetalong the curve by 22 inches in circumference. One tusk in the cityof Mexico is said to be 16 feet in length! Elephas colwmbi^ the Columbian mammoth, is thought by someauthorities to be but a variety of E. primigenius^ the teeth being tran-sitional in the character of the la-mellae between the latter and E. im-perator. In fact, they greatly re-semble those of the modern
. Annual report of the Board of Regents of the Smithsonian Institution . covering of cement was ex-tremely thick. Elephas iinperator was ofgreat size, 13^ feet in height atthe shoulder, and the huge,spiral tusks measured 13 feetalong the curve by 22 inches in circumference. One tusk in the cityof Mexico is said to be 16 feet in length! Elephas colwmbi^ the Columbian mammoth, is thought by someauthorities to be but a variety of E. primigenius^ the teeth being tran-sitional in the character of the la-mellae between the latter and E. im-perator. In fact, they greatly re-semble those of the modern Indianelephant. E. colmnhi was early andmiddle Pleistocene in distribution,more southern in range than , though the two in-habited a broad frontier belt alongthe northern United States. E. co-lumhi reaches the maximum of evolution in the shortening and height-ening of the skull. The tusks in a mounted specimen in the AmericanMuseum of Natural History are so huge that their tips actually curvebackward and cross each other. They have completely lost their. Fig. 21.—Tooth of E. imperator (X I).
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
