CYCLOPOIDEA. ^35 



except that the joint following the geniculating articulation is more 

 slender and arcuate. Figure 9 a, represents the head of a male ; h, 

 the posterior part ; c, part of the right antenna ; d, the extremity of 

 the left antenna ; e, the right posterior foot ; /, one of the female feet 

 corresponding; g, a female abdomen, distorted (yet resembling the 

 female above described in the divaricate posterior angles of the thorax 

 and the divaricate stylets). The right male posterior foot is somewhat 

 different, but it may be owing partly at least to the position of the 

 organ when figured. Abdomen including stylets more than half the 

 cephalo thorax. Caudal setae shorter than abdomen. It was found in 

 the Pacific, April 3, 1839, in latitude 42° south, longitude 78° 45' 

 west; also, April 10, at 5 A. m., latitude 36° south, longitude 74° west. 

 At the latter date they were in immense numbers, and great quan- 

 tities were collected. A solid cubic inch of them, in the net at one 

 time, must have included forty thousand or fifty thousand individuals. 

 The abdomen of the females were occasionally distorted, as in fig. g, 

 in which the segments are irregularly enlarged, and on the left side, 

 there is a broad elongate lamellar appendage. 



Subgenus II. PONTELLINA. 



a. Cephalothorax jpostice obtusus, aut brevissinib acutus- 



PONTELLINA PLUMATA. 



Feminae : — Frons rotundatus. Cephalothorax curtus, obesus, §-articu- 

 latus, capite discrete, segmento postico perbrevi, et posticd vix acuto. 

 Oculi suyyeriores parce disjuncti. Antennas anticaz corpore paulo lon- 

 giores, late divaricatai, fere rectos, setis raris suboblongis, apicalibus 

 articulo plus duplo longioribus, subapicalibus brevioribus. Antennas 

 posticas ramis valde inasquis, setis ramorum et palporum sequentium 

 fere corporis longitudine instar plumarum. Styli caudales parce 

 oblongi. 



Female : — Front rounded. Cephalothorax very short and thick, six- 

 jointed, the head separate, rounded in front, behind hardly acute, 

 posterior segment very short. Superior eyes a little separate. An- 

 terior antennae somewhat longer than the body, obliquely divari- 



