I D T M I D E A. 701 



joints is very minutely scabrous, as seen under a high magnifier. 

 Length, four to five lines. 



Obtained between New Holland and Northern New Zealand, five 

 hundred miles from Port Jackson, N. S. W. 



iDOTiEA ANNULATA. 



Elongata, parce elliptica; f route truncate, obsolete arcuato; superficie 

 annulaid, segmentis prominentibus ; epimeris latiusculis. Abdomen 

 lat£ oblongum, lateribus fere parallelis, apice truncato angulis rotun- 

 dat'w. Oculi prominentes, ad angulos insiti. Antenna? internee 

 dimidio basis externarum non longiores, articulo ultimo longiore, 

 obtuso. Antcnrice externa? fermd dimidii corporis longitudine, flagello 

 breviore quam basis, 7-articulato, articulis duobus ultimis non bre- 

 viores; setulis paucis brevissimis. Pedes nudiusculi. 



Elongate, sparingly elliptical, front truncate or slightly arcuate ; sur- 

 face annulate, the segments being prominent; epimerals rather 

 broad. Abdomen broad oblong, sides nearly parallel, apex trun- 

 cate, with the angles rounded. Eyes prominent, situated on the 

 angles. Inner antennae not longer than half the base of the outer, 

 last joint longest, obtuse. Outer pair about as long as half the 

 body ; flagellum shorter than the base, seven-jointed, last two joints 

 not shorter than the preceding ; setae few and very short. Feet 

 nearly naked. 



Plate 46, fig. 3 a, animal, enlarged; b, c, antennae, more enlarged; 

 d, first pair of legs ; e, third pair. 



Taken in the Antarctic Seas, south of New Holland, in 1840. Col- 

 lected by Mr. John Dyes. 



Length, three-fourths of an inch ; greatest breadth, one-fourth of an 

 inch. The abdomen is more than half as long as the rest of the 

 body ; the segments of the thorax are prominent between the arti- 

 culations. The outer antennae have the last joint of the base about 

 one-third the length of the preceding. The joints of the flagellum 



176 





