. Cuvier's animal kingdom : arranged according to its organization. Animals. 424 CRUSTACEA. perate zones. Although we have observed a very great number of individuals, we have never met with one carrjdng eggs. Their habits are entirely unknown. It is, however, beyond a doubt, that those species with powerful claws use them for the purpose of seizing their prey in the same manner as those Orthoptera which are named Mantes * ; and it is on account of this conformity that these Stomapods have received the name of Sea-Mantes. They were named Crangones, or Crangines, by the Greeks. According to. M.


. Cuvier's animal kingdom : arranged according to its organization. Animals. 424 CRUSTACEA. perate zones. Although we have observed a very great number of individuals, we have never met with one carrjdng eggs. Their habits are entirely unknown. It is, however, beyond a doubt, that those species with powerful claws use them for the purpose of seizing their prey in the same manner as those Orthoptera which are named Mantes * ; and it is on account of this conformity that these Stomapods have received the name of Sea-Mantes. They were named Crangones, or Crangines, by the Greeks. According to. M. Risso, they keep in deep water, in sandy and muddy bottoms, and couple in the spring ; but other species, forming our second family, being less favoured in respect to their natatory appendages, and having the body very flat and extended in its surface, are ordinarily found on the surface of the ocean, where they move but slowly. We divide the order Stomapoda into two famihes. In THE FIRST FAMILY OF STOMAPODA,— Unipeltata,— The carapax forms only a single shield of a quadrilateral, elongated shape, generally widened and free behind, covering the head (with the exception of the eyes and antennae, which are implanted upon common and frontal articulations), and at least the anterior segments of the thorax- Its anterior ex- tremity terminates in a point, and is preceded by a small plate terminating in the same manner. All the foot-jaws (of which the second pair is very large), and the four anterior feet, are inserted close to the mouth in two Unes converging inferiorly, in the form of claw-feet, with a single moveable and folded back finger. With the exception of the second pair of legs, all these organs are externally fur- nished at the base with a small pedunculated vescicle. The other feet, six in number, are linear, ter- minated by a brush, and merely natatorial : the third joint is furnished at the side and base with a slender appendage. The lateral antennae have a scale a


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Keywords: ., bookcentury1800, bookdecade1840, bookpublishe, booksubjectanimals