The upper lip is cleft, the jugal lacks an inferior angle, the fore part of the skull is short and broad; the cheek-teeth are partially rooted, with external and internal enamel-folds, the soles of the feet are smooth, there are six pairs of teats, the clavicles are imperfect and the tail is not prehensile.
In North America Mylodon was accompanied by another gigantic species typifying the genus Megalonyx, in which the fore part of the skull was usually wide, and the third and fourth front toes carried claws.
Also the notion that snakes when attacking are able to jump off the ground is quite erroneous; when they strike an object, they dart the fore part of their body, which was retracted in several bends, forwards in a straight line.
The kangaroo and most of its congeners show an extraordinary disproportion of the hind limbs to the fore part of the body.
Its general colour is blackish, lighter by mixture of brown or grey on the head and upper fore part of the body, with no light patch on the throat, and unlike other martens generally darker below than above.
In size it resembles the striped hyena, but differs in appearance, owing to the fringe of long hair covering the neck and fore part of the back.
From Hooke's Posthumous Works (1705), p. 127, we find that in one of the Cutlerian lectures on Light delivered in 1680, he illustrated the phenomena of vision by a darkened room, or perspective box, of a peculiar pattern, the back part, with a concave white screen at the end of it, being cylindrical and capable of being moved in and out, while the fore part was conical, a double convex lens being fixed in a hole in front.
But soon the fore part of him slowly rose from the water; for an instant his whole marbleized body formed a high arch, like Virginia's Natural Bridge, and warningly waving his bannered flukes in the air, the grand god revealed himself, sounded, and went out of sight.
And these bring forth the ant-lion, a compound of both, and in part like to either, for his fore part is that of a lion, and his hind part like that of an ant.
The flying species are also distinguished from ordinary flyingsquirrels by the circumstance that the additional bone serving for the support of the fore part of the flying-membrane rises Pigmy African Flying-Squirrel (Idiurus zenkeri).