

1242 CRUSTACEA. 



lamellae. Female: — Body very narrow and nearly cylindrical. 

 Cephalothorax more than three times as long as broad, posterior 

 angles obtuse or subacute, anterior segment very long. Conspicilla 

 very large, situated on the front. Abdomen five-jointed, first segment 

 very short and much the narrowest, second larger, but much 

 smaller than the following, sublunate. 



Plate 87, fig. 4 a, animal, enlarged; b, posterior antenna. 

 Pacific, latitude 15° north, longitude 179° east, December, 1841. 



Length, one-tenth of an inch. Not coloured. 



This species is near the preceding; yet the body is more convex or 

 more cylindrical, and the abdomen is but five-jointed, with the first 

 segment much shorter and narrower than the second, instead of 

 having the two nearly equal, and the second is as much smaller than 

 the third. Moreover, the caudal lamellae are proportionally much 

 broader, the length being one and a half times the breadth. The 

 caudal setae are not half as long as the lamellae. The cephalothorax 

 has four distinct segments, and the first of the four is more than twice 

 as long as broad. 





Sapphirina metallina. 



Lamellae caudales fere rectangidatas, apice subtruncatw, setis quatuor api- 

 calibus subcequis, parch brevioribus quam lamellae. Maris :— Corpus 

 valde depressum, angustato-ellipticum, 9-articulatum, segmento ultimo 

 tecto, primo oblongo, quarto dimidio breviore quam quintum. Conspi- 

 cilla f route insita. 



Caudal lamellae oblong, subrectangular ; four terminal setae, which are 

 scarcely shorter than the lamellae. Male:— Body much depressed, 

 narrow elliptical, nine-jointed, last segment concealed below, first 

 a little oblong, fourth half shorter than fifth; segments of thorax 

 and abdomen lunate, and acute laterally or subacute. Conspi- 

 cilla of moderate size, situated on the front. 



