32 Mr. G. 8. Brady on Ostracoda | 
Hab. Lat. 67° 17'N., long. 62° 21'W. Six feet below 
low-water mark. 
This species is very closely related to C. emarginata, Sars, 
but is altogether destitute of the peculiar angulated ridge 
which runs across the hinder portion of the valves in that 
species ; the surface-markings are also less sharply cut and less 
angular. The valves are precisely similar to those of C. emar- 
gtnata in lateral outline; and, as in the following species, it is 
most difficult to say positively whether the differences which 
have been pointed out are dependent upon habitat only, or 
upon more deeply seated innate causes. These often recurring 
cases tend strongly to impress one with the idea, though they 
certainly do not prove the fact, of a community of descent. 
Many of the less-strongly sculptured examples of this species 
appear very distinct ; but others approach C. emarginata very 
closely, and some occupy apparently an intermediate position 
between that species and C. finmarchica, to which latter species 
the dorsal aspect of C. borealis bears great resemblance. 
Cythere pulchella, Brady. (Plate V. figs. 18-20.) 
Cythere pulchella, Brady, Monog. Recent Brit. Ostrac. p. 404. 
Carapace of the female, as seen from the side, subreniform ; 
greatest height situated in the middle, and equal to more 
than half the length: anterior extremity broadly rounded ; 
posterior narrowed, obliquely subtruncate : superior margin 
boldly arched, highest near the middle; inferior sinuated in 
the middle: seen from above ovate, widest a little behind the 
middle ; width scarcely equal to half the length, extremities 
obtusely pointed. Shell-surface covered with closely set, 
rounded, shallow puncta; colour reddish-brown. The 
hinge-teeth of the mght valve form two projecting ridges, 
which end abruptly at their terminal extremities, but slope 
gradually towards the middle of the hinge-line, and are 
crenulated on their edges. . The flagellum or urticating seta 
of the second antenna in the female is biarticulate, long and 
slender; the upper antenna armed at the apices of the four 
last joints with slender, slightly curved spines, third and 
fourth joints coalescent. The mandibular palp bears three 
curved plumose sete. eet short and stout, their terminal 
claws much dilated at the base, nearly straight in the middle, 
and suddenly curved (almost hooked) at the apex. Length 
as inch. 
It is with some hesitation that I accord to this a specific 
rank as distinct from C. rubida, feeling by no means certain 
that the last-named species may not be a dwarfed southern 
