712 CRUSTACEA. 



multiarticulato confectce. Opercula abdominis lamellam parvulam 

 internam ad articulationem gerentia. Pedes 8 antici tar so tenui con- 

 fecti et subprehensiles. 



First pair of antennae situated above the second and longest, four- 

 jointed. Inferior (second) pair ending in a multiarticulate flagel- 

 lum. Outer abdominal plates having an inner lamella at the arti- 

 culation. Eight anterior feet terminating in a slender tarsus, which 

 closes on the preceding joint. 



Both pairs of antennas are moderately long and are reflexed either 

 side of the body ; the second pair is here the shorter, and is situated 

 beneath the first pair. 



Ch^etilia ovata. 



Ovata, postice acuminata. Caput posiice arcuatum, f route paulo exca- 

 vatum. Oculi remoti, rotundati, mediocres. Thorax 7-a? , ticulatus, 

 segmento septimo valde angustiore quam sextum et partim celato, sexto 

 utrinque posticd acuto. Abdomen k-articulatum, 3 seg mentis trans- 

 versis, quarto perangusto, longoe acuminato, subacuto, apice ciliato, 

 prope basin suturd notato. Antennas superiores fere dimidii corporis 

 longitudine, 4:-articulatce, articidis tribus ultimis tenuibus longis, ultimo 

 extus subtiliter setuloso. Antennas inferiwes valde breviores, flagello 

 fermh 10-articulato, articidis basis duobus ultimis antici setulosis. 

 Pedes sexti corporefere duplo longiores. 



Ovate, acuminate posteriorly. Head arcuate behind, front a little 

 excavate. Eyes remote, round, of moderate size. Thorax seven- 

 jointed, seventh segment much narrower than sixth and partly con- 

 cealed by it, sixth on either side acute. Abdomen four-jointed, 

 three segments transverse, fourth long and narrow triangular, sub- 

 acute and ciliate at extremity, having a suture near base. Superior 

 antennae nearly half as long as body, four-jointed, the last three 

 joints long and slender; the terminal one setulose on outer side. 

 Inferior antennae one-fourth shorter, flagellum about ten-jointed, 

 last two joints of base setulose on anterior margin, and hairy on 

 the posterior. Sixth pair of feet almost twice as long as the body. 



