CRUSTACEA. 



duplo longiore quam ultimus. Antennce externce extremitate truncates, 

 artieulo ultimo apice 5-lobafo, lobis oblongis, inferno breviore, articulo 

 2do ultimum fere superante, extus unidentato, intus B-dentato, super- 

 fide carinatd, carind integrd. Pedes nudi, subteretes, inermes, Zdis 

 pergracilibus, tarso 2do duplo longiore quam Stius. 



Carapax pubescent with exceedingly minute spinules, having a spine 

 on the median line near the front margin and another on the 

 gastric region, near the orbits either side subcarinate, and one or 

 two-toothed. Inner antenna} nearly naked, penult joint of base 

 nearly twice as long as last joint. Outer antennae truncate at ex- 

 tremity, last or fourth joint with five deep.lobes, inner lobe shorter, 

 second joint extending a little farther forward than last joint, 

 having the outer margin one-toothed, and inner three-toothed, with 

 an even carina (not toothed) on its surface. Feet naked, subterete, 

 and not angulate, unarmed ; second pair very slender, the tarsus 

 twice longer than tarsus of. third pair. 



Plate 32, fig. 7 a, animal, enlarged four diameters ; ft, sternum, 

 ibid.; c, leg of first pair, ibid. ; d, leg of second pair, ibid.; e. leg of 

 third pair, ibid.; /, abdominal appendage of second segment; g, inner 

 antennae. 



Feejee Islands. 



Length, one inch. The surface of the carapax and of the outer 

 antennae is covered with short minute plumes, mostly obscuring the 

 tubercles. The anterior spine of the carapax is simple ; the gastric 

 has three or four squamiform tubercles, posterior to it; and then 

 follows a smooth surface ; then, just behind middle of carapax, on the 

 median line, there is a prominent ridge extending backward, which is 

 made up of two series of squamiform tubercles, but little prominent 

 except the anterior. The second and third abdominal segments have 

 a median piece, which is lobed anteriorly; and either side, the poste- 

 rior half of the surface has a regularly lubed appearance, while the 

 anterior half is but faintly divided into a few arcolets ; the fourth and 

 fifth are also divided into areolets in two transverse series ; but the 

 series are nearly equal. The sternum is very broad for its length, 

 with the two lobes in front rounded. The tarsi of the first and third 

 pairs are nearly equal. 



