Arcturus is a star of the first magnitude, situated in the left knee, and is twenty-six degrees south-east of Cor-Coroli. Three small bright stars curve down to the left foot, while three of the same size, about nine degrees east, curve in the same manner, and form the right leg. Three stars curve upwards, forming the left arm, which he holds aloft, while three still more minute ones mark the neud of the leash which he holds in his left hand, while his right one is marked by four stars; three very minute ones mark the club with which he urges on the hounds. The ancient Greeks called this group Lycaon, which signifies a wolf, asserting that it is Calisto who was changed into a wolf by Juno. "But now her son had fifteen summers told, Fierce at the chase, and in the forest bold, When, as he beat the woods in quest of prey, He chanced to rouse his mother where she lay. She knew her son, and kept him in her sight, And fondly gazed; the boy was in a fright, And aimed a pointed arrow at her breast, And would have slain his mother in the beast; But Jove forbade, and snatched her through the air In whirlwinds up to heaven, and fixed her there." The Egyptians claimed the origin of it likewise, as also did the Hebrews. Its origin is probably too ancient to be traced. * * * * * CENTAURUS.--This fabulous monster is represented as having the head and shoulders of a man, terminating in the body of a horse. It occupies a considerable space in the southern hemisphere, yet it is so low down that but little of it can be traced in our latitude. It is situated south of Spica Virginis, and contains thirty-five stars, two of which are of the first magnitude. Agena and Bengula are stars of rare brilliancy, and mark the fore-feet of the monster. These stars are never visible in our latitude, but shine with greater lustre than any that gild our own hemisphere. It is supposed this constellation took its rise from the simplicity of the shepherds of the earlier ages, who, on seeing men on horses, supposed them part of the animals they rode; so the Spanish cavalry seemed to the Mexicans as late as the year 1500. The Centaurs were, in reality, a tribe of Lapithæ, who resided near Mount Pelion, and first invented the art of breaking horses. Virgil says-- "The Lapithæ to chariots add the state Of bits and bridles; taught the steed to bound, To turn the ring, and trace the mazy ground, To stop, to fly, the rules of war to know, To obey the rider, and to dare the foe." * * * * * LUPUS.--This constellation is situated south of Libra and east of the Centaur, and is so low down that it cannot be traced in our latitude. It contains twenty-four stars of a small magnitude.