32 Mr. G. S. Brady on Ostracoda 



Hah. Lat. 67° 17' N., long. 62° 21' W. Six feet below 

 low-water mark. 



This species is very closely related to G. 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 (7. emar- 

 ginata 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 G. emarginata very 

 closely, and some occupy apparently an intermediate position 

 between that species and G. finmarchica^ to which latter species 

 the dorsal aspect of G. horealis bears great resemblance. 



Gythere pulchellaj 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 j width scarcely equal to half the length, extremities 

 obtusely pointed. Shell-surface covered with closely set, 

 rounded, shallow punctaj colour reddish-brown. The 

 hinge-teeth of the right 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 setae. Feet 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 

 ■h inch. 



It is with some hesitation that I accord to this a specific 

 rank as distinct from G. rvhida^ feeling by no means certain 

 that the last-named species may not be a dwarfed southern 



