of the North Atlantic and of North-Western Europe. 647 



^,1. Cypridina norvegica, Baird. 



(PL Liv., figs. 7, 8 ; PL lx., figs. 19-21.) 



1860. Cypridina norvegica, . . Baied, " On some New Species of Ci/pridina" 



Ann. & Mag. Nat. Hist., voL vi., p. 139. 

 1860. „ ,, . . Baied, "Note on the Genus Cyjmdina, with a 



Description of some New Species," Proc. 



ZooL Soc, p. 200, pL Isxi., figs. 4, 4a-d 

 1865. ,, ,, . . Saes, G. 0., "Oversigt af Norges marine 



Ostracoda," Vid.-Selsk. Forhand., p. 104 



(separate copy). 

 1869. „ „ . . NoEMAN, "Last Eeport Dredging Shetland 



Isles," Rep. Brit. Assoc, 1868, p. 295. 



Shell of female seen from the side subovate, greatest height central, extremities 

 nearly equal, ventral and dorsal margins moderately and equally arcuated ; hinder 

 margin centrally slightly truncate or a little emarginate, infero-posteal corner 

 completely rounded ; anterior extremity, with the antennal sinus central, very 

 narrow and shallow, directed obliquely upwards, the rostrate process small, well 

 arched above (in continuation with the dorsal margin), acute at the extremity, and 

 pointing slightly downwards, the junction of the lower side of the sinus with the 

 ventral margin forming nearly a right angle, though the angle itself is rounded 

 off; valves white, smooth, shining, and sub-transparent. Seen from above the 

 form is elongated-ovate, the ends nearly equal, the anterior slightly more pointed ; 

 greatest width central, equal to half the length. Length 4 mm. ; height 

 3 mm. 



In the female the antennules are seven-jointed, the first two joints sub- 

 equal in length, without any setae ; the third is very short, with two setae ; the 

 fourth about twice as long as the third, with two distal setae ; the fifth somewhat 

 shorter than the third, its outer margin naked, the inner furnished at its extremity 

 with a long, ringed, filiferous, sensory ajppendage ; last two joints very short, 

 bearing five or six short setae and three long setae, on which are solitary cilia at 

 regular intervals. Antennae with swimming branch bearing eleven swimming 

 setae, each with a spine by its base, the lowest seta short, not plumose but spined 

 on the proximal margin, the most distal seta very minute ; appendicular branch 

 having the first short joint with three setae, the second longer, with a distal seta; 

 third tapering and terminating in a very long, tapering, and ultimately very fine 

 seta. 



4 Y2 



