Reptiles are not commonly accounted among the beauties of Nature; but they must not be lost sight of in reviewing the life of the forest. The largest is the python, whose usual length is 12 feet, though individuals of 16 to 20 feet are not very rare. A very beautiful snake found in the cool forests is green with a broad black band on each side of the hinder half of the body and tail, the green scales being margined with black. Another snake of the same length is a handsome green whip-snake, graceful in its movements, but ferocious and aggressive in its habits, although quite harmless. The ordinary cobra is not uncommon. The giant cobra is also found in the lower valleys, and grows to a length of 12 or 13 feet. Four species of pit vipers are found. The krait occurs, but is not common. Altogether there are nine species of venomous snakes and thirty species of non-venomous snakes found in Sikkim. Of lizards there are ten species. One is popularly known as the chameleon on account of its rather showy colours, but does not really belong to that family. And a beautiful grass-snake, which, as it is limbless, is often mistaken for a tree-snake, is also of the lizard genus. Of frogs and toads there are about sixteen species. Among them are several prettily-coloured tree-frogs. Several of the species are recognised by their call. * * * Of mammals about eighty-one species are found. They include three monkeys, eight of the cat tribe, two civet cats, one tree cat, two mongooses, two of the dog tribe, five pole-cats and weasels, one ferret-badger, three otters, one cat-bear, two bears, one tree-shrew, one mole, six shrews, two water-shrews, twelve bats, four squirrels, two marmots, eight rats and mice, one vole, one porcupine, four deer, two forest-goats, one goat, one sheep, and one ant-eater. The common monkey of India, the Bengal monkey, is found in large companies at low elevations. The Himalayan monkey is abundant from 3,000 to 6,000 feet; and the Himalayan langur frequents the zone from 7,000 to 12,000 feet.