7 o 2 CRUSTACEA. 



bobus vmnino exsertis, rninore dimidw breviore, bad brevi. Articulus 

 pedum posticarum 5tus infra spimdis longiusculis et crassiusculis 

 arrnatus. 



Head suborbicular, front arcuate, no antero-lateral processes prominent. 

 Body shining, not granulate. Five anterior segments of thorax 

 nearly straight transverse. Abdomen abruptly much narrower 

 than the thorax, hardly longer than broad, sides entire, the seg- 

 ments not projecting either side, last segment very transverse, the 

 posterior margin broad triangular; stylets a little shorter than the 

 abdomen, both branches exsert, the inner half shorter than the 

 outer, base short. Fifth joint of posterior legs armed below with 

 longish spinules. 



Plate 48, fig. 4 a, animal, enlarged, mutilated in its antennae; b, 

 outer maxilliped; c, extremity of posterior leg, upper view; d, same, 

 lateral view; e, tarsus of same, more enlarged; /, caudal stylets. 



Sandwich Islands. 



Length, three to four lines. Strongly marbled with brownish black, 

 and often a black spot below on the bases of the legs. The last abdo- 

 minal segment does not cover the bases of either branch of the stylets, 

 the base of the shorter being nearly in the same line with that of the 

 longer. The species is broader than the angustus, and the fifth joint 

 of the last pair of legs in that species is furnished only with short 

 setules, not longer than the diameter of the joint. 



Philoscia ? 



Plate 47, fig. 11 a, animal, enlarged; b, extremity of antennae; c, 

 apex of second joint of flagellum. 



Madeira. 



The recognised species of Philoscia are so imperfectly characterized, 

 that we forbear referring our specimen to any species, especially as 

 the caudal stylets are wanting, these being the organs particularly 



