This group, with its accessories, is, in point of size, about the biggest thing ever attempted by a taxidermist. It was mounted by Mr. Hornaday, assisted by Messrs. J. Palmer and A. H. Forney. It represents a new departure in mounting specimens for museums. Generally such specimens have been mounted singly, upon a flat surface. The American mammals, collected by Mr. Hornaday, will be mounted in a manner that will make each piece or group an object lesson, telling something of the history and the habits of the animal. The first group produced as one of the results of the Montana hunt comprised three coyotes. Two of them are struggling, and one might almost say snarling, over a bone. They do not stand on a painted board, but on a little patch of soil. Two other groups designed by Mr. Hornaday, and executed by Mr. William Palmer, are about to be placed in the Museum. One of these represents a family of prairie-dogs. They are disposed about a prairie-dog mound. One sits on its haunches eating; others are running about. Across the mouth of the burrow, just ready to disappear into it, is another one, startled for the moment by the sudden appearance of a little burrowing owl that has alighted on one side of the burrow. The owl and the dog are good friends and live together in the same burrow, but there appears to be strained relations between the two for the moment. MAP ILLUSTRATING THE EXTERMINATION OF THE AMERICAN BISON. Prepared by W. T. Hornaday. INDEX. A. Abundance of the American bison, 387-393. Accidents to bison herds, 420. Affection, instinct of, in the bison, 433. _Agropyrum_, 429. Alabama, 380. Albinism in the bison, 411. Allard, Mr. Charles, 461. Allen, Mr. J. A., on the American bison, 377, 381, 385, 387, 450, 480. "American Field," quotation from, 433. Fur Company, 488. Andrews, Mr. Harry, 502. _Andropogon provincialis_, 427, 429. _scoparius_, 429. Argoll, Capt. Sam'l, discovery of bison by, 375, 378. Arkansas, 375. _Aristida purpurea_, 428 Ashe, Mr. Thomas, on the buffalo, 420, 485. _Astragalus molissimus_, 429. Atchison, Topeka and Santa Fé Railway, 493, 496, 498, 499. Athabasca, buffaloes in, 523-524. _Atriplex canescens_, 429. Audubon and Bachman, observations by, 400. Aurochs, or European bison, 394. B.