The Zoological Society of London was instituted in 1826, and occupies now about seventeen acres of gardens in the Regent's Park. Among the earliest tenants of the Menagerie were a pair of emues from New Holland; two Arctic bears and a Russian bear; a herd of kangaroos; Cuban mastiffs and Thibet watch-dogs; two llamas from Peru; a splendid collection of eagles, falcons, and owls; a pair of beavers; cranes, spoonbills, and storks; zebras and Indian cows; Esquimaux dogs; armadilloes; and a collection of monkeys. To the menagerie have since been added an immense number of species of _Mammalia_ and _Birds_; in 1849, a collection of _Reptiles_; and in 1853, a collection of _Fish_, _Mollusca_, _Zoophytes_, and other _Aquatic Animals_. In 1830, the menagerie collected by George IV. at Sandpit-gate, Windsor, was removed to the Society's Gardens; and 1834 the last of the Tower Menagerie was received here. It is now the finest public Vivarium in Europe. The following are some of the more remarkable animals which the Society have possessed, or are now in the menagerie:-- _Antelopes_, the great family of, finely represented. The beautiful _Elands_ were bequeathed by the late Earl of Derby, and have bred freely since their arrival in 1851. The Leucoryx is the first of her race born out of Africa. _Ant-eater. Giant_, brought to England from Brazil in 1853, was exhibited in Broad-street, St. Giles's, until purchased by the Zoological Society for 200l. _Apteryx_, or _Kiwi_ bird, from New Zealand; the first living specimen brought to England of this rare bird. The _Fish-house_, built of iron and glass, in 1853, consisting of a series of glass tanks, in which fish spawn, zoophytes produce young, and algæ luxuriate; crustacea and mollusca live successfully, and ascidian polypes are illustrated, together with sea anemones, jelly-fishes, and star-fishes, rare shell-fishes, &c.: a new world of animal life is here seen as in the depths of the ocean, with masses of rock, sand, gravel, corallines, sea-weed, and sea-water; the animals are in a state of natural restlessness, now quiescent, now eating and being eaten. _Aurochs_, or _European Bisons_: a pair presented by the Emperor of Russia, in 1847, from the forest of Bialowitzca: the male died in 1848, the female in 1849, from pleuro-pneumonia. _Bears_: the collection is one of the largest ever made. _Elephants_: including an Indian elephant calf and its mother. In 1847 died here the great Indian elephant Jack, having been in the gardens sixteen years. Adjoining the stable is a tank of water, of a depth nearly equal to the height of a full-grown elephant. In 1851 the Society possessed a _herd of four elephants_, besides a hippopotamus, a rhinoceros, and both species of tapir; being the largest collection of pachydermata ever exhibited in Europe.