of the North Atlantic and of North-Western Europe. 717 



in the middle. Seen from above, the outline is subcuneate, widest behind, the 

 greatest width being equal to half the length ; the lateral margins diverge gently 

 and in as lightly sinuated line from the front backwards ; the anterior extremity 

 is wide, subtruncate, or very obtusely rounded, the posterior subtruncate, with 

 well rounded angles, and about twice as wide as the anterior. The surface 

 of the valves is covered with rather large circular impressed puncta, and there 

 is generally a more or less distinct transverse central depression. In the fresh 

 condition the shell is furnished at the extremities with a few rigid hairs, those of 

 the anterior margin being extremely long, but not visible in dried specimens. 

 Colour, tawn5^-white or yellowish. The shell of the male does not differ much 

 except in being more compressed when seen dorsally. Length of female, -95 mm. ; 

 of male, '90 mm. (Gr. 0. Sars). 



The soft parts of the animal do not differ materially from those of C. serrulata 

 but the second and third maxillae are here figured. 



Generally distributed round the coasts of Norway in depths of 100—300 

 fathoms (Gr. 0. Sars and A. M. N.) ; Nice (Marquis de Folin). Taken also during 

 the cruise of the " Valorous" in 410 fathoms (Station 6). 



3. Cytherella laevis, Brady. 

 (PL Lxvi., figs. 7, 8.) 



1866. Cytherella Icevis, . . Brady, "Brit. Assoc. Report," 1866, p. 211. 

 1866. „ „ . . Brady, " Monog. Recent Brit. Ostracoda," p. 474, 



pi. xxxiv., figs. 15-17. 



Shell of the female, seen from the side, subelliptical, scarcely higher in front 

 than behind, greatest height in fhe middle, and equal to two-thirds of the length, 

 extremities well rounded, the posterior rather the narrower of the two; dorsal 

 margin rather boldly and evenly arched, ventral nearly straight. Seen from 

 above, the outline is subovate, twice as long as broad, the greatest width situated 

 a little behind the middle ; the anterior extremity is rather obtuse, the lateral 

 margins diverging with a gentle curve to the posterior extremity, which is wide 

 and truncated. Surface of the valves quite smooth, bearing a few short scattered 

 hairs, the left valve narrow and almost straight dorsally, while the left is very 

 strongly arched. Colour whitish. Length of female 1-05 mm. ; of male 0*9 mm. 

 The shell of the male is smaller, and the valves are flatter, so that when seen 

 dorsally the lateral margins are less distinctly curvate. 



Dredged on tlie west coast of Scotland (Mr. Jeffreys) ; west coast of Morocco, 

 off Cape Cantin, 418 fathoms; off the coast of the Soudan, 400-460 fathoms 

 (" Talisman " dredgings), and in a dredging of the " Travailleur " (1880), of which 

 the precise locality is not indicated (Marquis de Folin). 



TKANS. EOT. DT7B. SOC, N.S. VOL. V,, PAET XU, g "Q 



