1002 CRUSTACEA. 



finger, fourth with this finger elongate and slender, moveable finger 

 (without the claw) a little longer than the surface on which it closes, 

 claw rather long. Feet of fifth pair very large, coxa oblong, penta- 

 gonal, with sides a little concave, narrowed towards apex, where it 

 is but little wider than next joint, hand oblong, triangular, straight 

 and dentate within, finger (claw excluded) longer than the hand, 

 claw rather long. Sixth pair of feet long, fourth joint rather long 

 subcylindrical, coxa acute at apex and posterior basal angle rounded. 

 Seventh pair weak, coxa a little longer than the following part. 



Plate 68, fig. 9 a, animal, enlarged ; h, front view of head ; c, inner 

 maxillae; d, second maxillae; e, base of superior antennae; /, base of 

 inferior antennae ; g, first pair of feet ; h, second pair of feet ; % third 

 pair of feet ; h, fourth pair ; Z, abdominal leg ; m, extremity of abdo- 

 men. 



Atlantic, latitude 27° south, longitude 45° 10' west, off the Brazi- 

 lian coast. Collected, January 11, 1839, at 4 A. M. 



Length, two lines. Colour, mostly purple, with some brown. 

 Head subtruncate in front. Antennary area quadrate, height half 

 the height of head ; rest of the head covered with facets. There are 

 four masses of pigment. In a front view, two of a crimson colour 

 have a narrow lanceolate form, being rounded above and coming to 

 an acute point below, each side of the antennary area. Just exterior 

 to this pair, there is a second, of a green colour and subtriangular 

 form, presenting bright metallic reflections in certain lights. In a 

 lateral view the green area is in part projected upon the red one. I 

 did not ascertain beyond doubt that both pairs were spots of pigment. 



The thoracic segments are seven in number ; but the first is nearly 

 concealed under the second. The whole length of the thorax is less 

 than that of the abdomen. Last segment of thorax a little longer 

 than the preceding. Last abdominal segment broad triangular, 

 obtuse. Preceding segment very short. 



Mouth organs constitute a large triangular prominence below the 

 head, a front view of which is seen in figure 9 b. The maxillae are 

 represented in figures 9 c, d. The outer terminates in two narrow 

 imperfectly ciliated ensiform laminae, and within, there is an oblong 



