

CYCLOPOIDEA. -jjgg 



Antennm antica cephahthorace breviores, fere 90° divarlcatce et levis- 

 *m* mcurvate, 18-20-articulatce, setis totis perbrevibus, duabus apica, 

 hbus subuncinatis, articulo brevioribus. Styli caudales parce oblongi. 

 [Abdomen 3-artieidatum.~] 



Head separate, subtriangular, front obtuse. Cephalothorax short, short 

 acute behind, five- or six-jointed, posterior segments three, abruptly 

 smaller. Superior eyes very remote, inferior of moderate size. 

 Anterior antennae shorter than the cephalothorax, nearly 90° divari- 

 cate, slightly incurved, 18-20-articulate, setae all very short, the 

 apical two sparingly uncinate, shorter than the joint. Caudal 

 stylets sparingly oblong. [Abdomen three-jointed, the third segment 

 oblong.] 



Plate 81, ^g. 11 «, animal, enlarged; a', extremity of antenna; b, 

 base of the same; c, beak, nearly in profile; d, under view of inferior 

 eyes. 



Collected several specimens in the Atlantic, latitude 45° 35' south, 

 longitude 60° west, January 24, 1839, just before reaching Rio Negro, 

 Patagonia. 



Length, one-twelfth of an inch. Colour, bright copper-green, with 

 silvery or pearly reflections from the back, sides dirty orange. Some 

 large deep blue glands posteriorly in the cephalothorax. This is a 

 stout species like the last, and has also short, many-jointed antennae. 

 It differs in the posterior extremity of the thorax and the slightly 

 incurved antennae, as well as the uncinate setae at apex. The sides 

 of the cephalothorax are nearly parallel. The caudal stylets are 

 rather stout, and the outer margins of the two are divergent. The 

 segments of the thorax are abruptly smaller, each than the preceding. 

 There are four pairs of natatories, the anterior of which is much the 

 smallest. The mass constituting the inferior eyes has a subreniform 

 shape, and appears to show by its form and appearance that there are 

 actually two eyes. The shorter branch of the posterior antennae is 

 about three-fourths the length of the longer. 



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