ORDER DECAPODA. 179 



one upon the other. The ocular pedicles are long and fili- 

 form, and the third articulation of the jaw-feet is very large, in 

 the form of a lamina, emarginated at the end, and covering 

 the following articulations. The testa is almost ovoid, trun- 

 cated at the two ends, and convex. 



The last articulation of the second feet, and of the two fol- 

 lowing pair, is triangular, but approaches, in the last at least, 

 to the form of a crescent. The last two of the fourth pair are 

 straightened up, and applied on the preceding two. The first 

 one of the tail has two impressed and transverse lines. {Hippa 

 adactyla, Fab.) 



Remipes, Latr., 



Have the two anterior feet elongated, with the last articulation 

 conical, compressed, and hairy. The four antennae are very 

 much approximated, very short, and nearly of the same length; 

 the intermediate are terminated by two threads. The ocular 

 pedicles are very short and cylindrical. The external jaw- 

 feet are in the form of small claws, slender, arched at the end^ 

 and terminated by a strong hoDk. The testa is conformed 

 like that of hippa. 



The last articulation of the second and third feet forms a 

 triangular plate, with an emargination at the external side ; 

 the same of the fourth, is triangular, narrow, and elongated. 

 As well as in hippa, the first segment of the tail presents 

 two impressed and transverse lines. {Remipes testudinarius, 

 Latr.) 



Sometimes {Pagurini, Latr.) the teguments are slightly crus- 

 taceous, and the tail most frequently soft, in the form of a sac, 

 and rounded. The two anterior feet terminate in a didacty- 

 lous hand; the four following go into a point, and the poste- 

 rior four, shorter, finish by a sort of forceps or small didacty- 

 lous hand. The first articulation of the peduncle of the lateral 



N 2 



