CYCLOPOIDEA. 1077 



thorax 5-articulatus, articulo ultimo brevissimo, angulis posticis elon- 

 gate acutis. 



Near the G. communis in the anterior antennae and caudal setae. 

 Cephalothorax five-jointed, last segment very short, posterior angles 

 long acute. 



Plate 74, 1ig. 8 a, animal, enlarged ; b, extremity of antenna. 



Collected in the Pacific, near the island of Upolu, Samoan Group, 

 February 26, 1841, at 9 p. m ; also off southeast end of Mindoro, East 

 Indies, February 1, 1842. 



Length, one-tenth of an inch. Colour, a faint tinge of bluish 

 purple, with some red blotches in posterior segments of cephalo- 

 thorax. 



The caudal setae are much less spreading than in G. communis, and 

 the second seta is longer in proportion to the others. 



Calanus bellus. 



Frons rotundatus. Cephalothorax posticd elongate^ acutus, 5-articulatus, 

 articnlis 4 posticis subwqias. Antennas anticw corpore paululo longiores, 

 vix cluplo curvatw, apicibus fronte non anterioribus ; setis brevibus, 

 una tertii articuli longd, duabus posticis subapicalibus longis, subwquis, 

 apicalibus brevibus, anticd penultimd paulo lotigiore. Styli caudales 

 breves, setis dijfusis, secundis fere duplo longioribus. 



Front rounded. Cephalothorax behind long acute, and points remote ; 

 five-jointed, four posterior segments subequal. Anterior antennae very 

 little longer than the body, scarcely doubly curved, nearly straight, 

 tips nearly in line of beak ; setae short, one from third joint long, 

 two posterior subapical quite long, subequal, apical short, with one 

 seta remote from apex, anterior penult about as long as joint. 

 Caudal stylets very short, setae much and neatly spread, the second 

 nearly twice as long as first. 



Plate 74, fig. 9 a, animal, enlarged, lateral appendages omitted ; 9 b f 

 extremity of antenna. 



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