CYCLOPOIDEA. H37 



or six-jointed, posterior segments three in number, head separate. 

 Superior eyes sparingly separated. Anterior antennae as long as the 

 body, divergent 60°-90°, and near middle slightly bent outward, 

 setae rather short, a longer one towards the middle, posterior penult 

 longer than apical or the other subapical setae. Right anterior an- 

 tenna of male not terete, containing near middle a large flattened 

 ovate joint, bearing within a longish seta and others shorter, the 

 three following joints slender linear, the last of the three, triple. 

 Posterior antennae with very unequal branches and long setae. 

 Abdomen four- or five-jointed. Caudal stylets a little more than 

 twice as long as broad ; setae of moderate length, spreading. 



Plate 79, figs. 11 a, b, and 12 a, b, different varieties, enlarged. 



Collected abundantly in the Atlantic, October 15, 22, 23, 26, lati- 

 tude Sh° north to 0°, longitude 23°-18° west, and November 5, 6, 7, 

 latitude l°-4£° south, and longitude 17i°-21i° west; also, April 8, 

 1842, on the Lagulhas Bank, off Cape of Good Hope; also, in the 

 Atlantic, May 13, 1842, latitude 4° 30' south, longitude 25° west, 

 and May 17, 1842, latitude 0° 15' north, longitude 31° west; also, 

 common in the Pacific, April 13 and 28, 1841, near Hall's and Pitt's 

 Islands, Kingsmill Group, latitude l°-3° north, longitude 173° east. 



Length, one-twenty-fourth of an inch. The specimen collected on 

 the Lagulhas Bank is represented in figures 12 a, b; while the Pacific 

 specimens are represented in figures 11 a, b. The latter is the form 

 found in the equatorial Atlantic. They appear to be essentially the 

 same. Yet in one, the abdomen has four segments, and the large joint of 

 the right male antenna has an angle towards the base on the posterior 

 side ; and in the other, there are five abdominal joints, and the large 

 antennary joint referred to is rounded on the posterior side. 



In both, the length of the cephalothorax is about twice the width in a 

 vertical view. The superior eyes are slightly separated. The antennae 

 are of the same length and position, and the setae similar ; the ante- 

 rior apical setae being longer than the apical joint, and directed obliquely 

 forward; the posterior penult of same length or a little longer, the 

 anterior penult short, the posterior seta of antepenult shorter than 

 joint, the anterior antepenult much shorter. The last three joints of 



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