ORDER DEC APOD A. 191 



articulation but one, or that which is in the form of a hand, 

 and the body, or articulation which precedes it, is not an- 

 nulated. 



First come the Carides, whose feet are robust, and not 

 filiform, and without any appendage at their external base ; 

 their body is never very soft nor very much elongated. 



Among these subgenera with feet without appendages, the 

 three following again present unusual forms as regards tlie 

 claws. 



Tn that of 



CrANGON, i^rti* , 



The two anterior claws, larger than the following feet, have 

 but a single tooth at the place of the index or fixed finger, 

 and that which is mobile is in the form of a hook, and bent. 



The upper and middle antennae have but two threads; 

 the second feet are folded, more or less distinctly bifid or 

 didactylous at their extremity ; none of their articulations 

 are annulated ; the anterior bill of the testa is very short. 



We shall not separate from Crangon the Egeon of M. 

 Risso, or the Pontophtlus ofZ>r. Leach. In the latter, the 

 last articulation of the external jaw -feet is as long again as 

 the preceding, while they are of equal length in the first ; the 

 second feet of Egeon are shorter than the third, and the 

 smallest of all, whereas their length is the same in crangon. 

 But the number of species being very limited, this generic 

 distinction becomes so much the less necessary. {Crangon 

 vulgaris.) 



Process A, Leach, Nika, Risso, 



Have one of the anterior feet simply terminating in a point, 

 and the other'in a didactylous forceps ; the two following are 

 unequal, slender, and also terminated by two fingers ; one of 

 these second feet is very long, with the carpus and the pre- 



