CYCLOPOIDEA. 1253 



its two joints very unequal, claw quite short. Caudal lamellae sub- 

 oval, twice as long as broad, at inner apex a minute point, setaB 

 four, short, not half as long as lamellae, two apical, the others ex- 

 ternal. Female : — Body very slender, long, length more than three 

 times greatest breadth. Cephalothorax five-jointed, first articula- 

 tion nearly obsolete, segments not having the posterior angles acute, 

 sides truncate, first anterior segment a little oblong, the others gra- 

 dually smaller. Conspicilla small, a short distance from the front. 

 Abdomen narrow, six-jointed, first and second segments subequal, 

 the following hardly lunate. Male : — Body ten-jointed, linear-ellip- 

 tical, length about two and a half times the breadth ; first segment 

 not oblong, the three posterior not acute laterally, the last nearly 

 concealed. Conspicilla rather distant, remote from the front. 



Plate 88, fig. 1 a, female, enlarged ; a', anterior antenna ; 5, b', pos- 

 terior antenna, different views ; c, anterior feet (or maxillipeds) ; d, e, 

 maxillaa ; /, maxillae in place. Fig. 2 a, male, enlarged, showing 

 nervous system (reddish), digestive system (greenish), genital system 

 (bluish), &c. (a, inner prolate lenses of eyes ; b, b', nervous system ; c, &, 

 genital system ; d, oesophagus ; /, conspicilla) ; a', prolate lenses and 

 pigment, with eyes intermediate; b, anterior antenna; c, posterior 

 antenna; d, first pair of feet; e, same, in place; /, lower extremity of 

 genital system (same with d in 2 a); g, nervous ganglion, with its 

 branches. 



Lagulhas Bank, south of Cape of Good Hope, April 11 and 12, 

 1842. Probably the same, twelve miles northeast of New Zealand. 



Length, one-eighth of an inch. Female, colourless ; bags of eggs, 

 dull bluish. Male, with very brilliant blue reflections, dazzling in the 

 sun's rays, with various other bright colours as the animal changes its 

 position. The water was spangled with them for several hours while 

 on the Lagulhas Bank. By transmitted light, deep yellow, rose, car- 

 mine, and fire-red tints. The female has the cephalothorax two and 

 a half times as long as broad. Joints obtuse and similar. Eggs of 

 external ovarian sacs small and very numerous. 



The male is lamellar. The last segment is placed partly under the 

 preceding and is half narrower. The inner angle of the caudal 



314 



