. Un système d'histoire naturelle : contenant des scientifiques [sic] et des descriptions populaires de l'homme, des quadrupèdes, des oiseaux, des poissons, des reptiles et des insectes . incrustés de grains de sable, d'orfragments de coquillages, dans d'autres solides, calcaires et homogènes. La partie greaterpart des Annelides est carnivore, suçant le sang d'autres animaux.ils sont hermaphrodites, mais exigent une imprégnation mutuelle. Cudivivier décompose la classe des Annelides en trois ordres :—1. Tubicol^, ceux dans lesquels les bronches sont sous forme de tufts, attachés à la tête ou à la partie antérieure du corps, et généralement dans des tubes.

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. A System of natural history : containing scientifci [sic] and popular descriptions of man, quadrupeds, birds, fishes, reptiles and insects . incrusted exteriorly with grains of sand, orfragments of shell, in others solid, calcareous, and homogenous. The greaterpart of the Annelides are carnivorous, sucking the blood of other animals.They are hermaphrodite, but require mutual impregnation. Cuvier dividesthe class of Annelides into three orders :—1. Tubicol^, those in which thebronchise are in the form of tufts, attached to the head or anterior part of thebody, and generally inhabiting tubes. 2. Dorsibranchi-e, where the bronchiseare toward the middle of the body, or along the sides. 3. Abranchi^, wherethe bronchiae are not apparent externally. Lamarck, on the other hand, divides the class into three orders, from other considerations, viz.: Order I. Sedentari^.—Destitute of antennae, eyes, and jaws, and inhabit-ing tubes. Order II. Antennat^.—Head with antennae and eyes, and a protractileproboscis often armed Avith jaws. Order III. Apodes.—Destitute of feet or setiferous papillae, and anten-nated head. THE EARTH WORMi. Has a power of contracting or lengthening itself at will. There is a spiralBiuscle, that runs round its whole body, from the head to the tail, somewhatxesembling a wire wound round a walking-cane, which, when slipped oflF, and one end extended and held fast, will bring the other nearer to it; inthis manner the earth worm, having shot out or extended its body, takeshold by the slime of the fore part of its body, and so contracts and brings Lumbricus ierrestris, Lin. The order Apodes to which the earth worm belongs, aredestitute of feet, without setiferous and retractile papillae; bronchise, when known, disposedinteriorly along the body; no autenniferous head. ARTICULATA-LEECa 777 forward the hinder part; in this manner it moves onward, not without greateifort; but the occasions for its progresssive motion are few. As it is designed for living und

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