

CYCLOPOIDEA. 



1243 



Plate 87, fig. 5 a, animal, enlarged; b, under view of anterior part; 

 c, caudal lamella. 



Pacific, near Gilbert's Island, Kingsmill Group, 1° 26' north, longi- 

 tude 173° 10' east, April 19, 1841, 6 h. A. m. 



Length, one-tenth of an inch. Colours, bright metallic, varying 

 between bright blue and fire-red through yellow, changing with the 

 position of the animal. By transmitted light, blue, carmine, and 

 purple, in blotches or patches. 



The body is rounded alike at the two extremities. The setae of the 

 anterior antennae are some of them longer than the organ. The last 

 thoracic segment is much shorter but not narrower than the ante- 

 penult or following segment. The last segment of the body is con- 

 cealed beneath the preceding, and the latter is so excavate behind 

 that the caudal lamellae project but little beyond it. The setae of the 

 lamellae are all terminal or nearly so, the extremity being truncate, 

 and so also the outer angle. 



Sapphirina coruscans. 



Digitus antennarum posticarum paulo brevior quam articulus 2dus, tenuis. 

 Lamellce caudales subovatce, ad apicem rotundatce, apice interno setam 

 brevem gerente, setis aliis quatioor, totis brevibus (lamelld fere quad- 

 ruplo brevioribus) . Maris: — Corpus depressum, elongato-ovatunij 

 posticd angustatum, segmento primo {fere duplice) parce oblongo, aliis 

 segmentis fere consimilibus. Gonspicilla fronte insita, prominentia. 



Einger of posterior antennae a little shorter than second joint, slender. 

 Caudal lamellae ovate, rounded at apex, twice as long as broad, 

 inner apex bearing a short seta, the other setae four, all very short 

 (about one-fourth as long as lamellae). Male: — Body depressed, 

 long ovate, narrowed behind, first segment (appearing faintly 

 double) slightly oblong. Conspicilla large and prominent, situated 

 on the front. 



Plate 87, fig. 6 a, animal, natural size; b, posterior antenna. 



