2 G. STEWARDSON BRADY. 
almost pyriform ; the proximal long seta armed along its middle third with a double 
series of about twenty-five short, sharp prickles (fig. 8); in the female these are 
replaced by fine simple hairs (fig. 9). The secondary branch of the male antenna 
(fig. 11) bears a large terminal hook, the base of which is sharply bent at a right angle, 
and there is the usual fascicle of five long sete ; in the female (fig. 10) the secondary 
branch has a simple terminal joint which bears four setee of unequal length. Spines 
of the caudal lamine slender and simple (fig. 14). The shell appears simply granular 
in structure until after removal of the delicate lining membrane, when it is seen to be 
very closely and finely striated in a curvilinear fashion ; there is a conspicuous group 
of gland-cells at the postero-ventral angle of the shell, and smaller gland-cells are 
continued in single file round the entire margin. 
This species occurred plentifully in almost all the nettings taken in Winter 
Quarters. It was, indeed, by far the most abundant of all the Ostracoda taken during 
the Expedition. It has many points of resemblance to Paraconchecia inermis, Claus, 
but cannot be identified with that species. 
PARACONCH@CIA GRACILIS. 
Paraconchacia gracilis, Claus. Die Gattungen und Arten der Mediterranen und Atlantischen 
Halocypriden, p. 15. 
Paraconchecia gracilis, Claus. Die Halocypriden des Atlantischen Oceans und Mittelmeeres, p. 66, 
Pl. xii. 
In a surface gathering from lat. 49° 40'S., long. 172° 18’ 30” E. were found a 
few examples of this species. Claus saw only two specimens, a male and a female, in 
material taken from a depth of 1500 metres in lat. 37° 45’ N., long. 13° 38’ W. 
PSEUDOCONCH@CIA SERRULATA, var. levis. 
1874. Conchecia serrulata, Claus. Die Familie der Halocypriden, p. 61, Pl. 1, figs. 2-7, 9-11, PI. ii. 
fies. 12, 18, 17, 19. 
1880. Halocypris atlantica, Brady. Report on the Ostracoda of the ‘ Challenger’ Expedition, p. 164, 
Pl. xi., figs. 1-15, Pl. xii., figs. 11, 12. 
1890. Pseudoconchecia serrulata, Claus. Die Gattungen und Arten der Mediterranen und Atlantischen 
Halocypriden, p. 20. 
1891. Pseudoconchwcia serrulata, Claus. Die Halocypriden des Atlantischen Oceans und Mittelmeeres, 
p- 72, Pl. xix., figs. 1-14, Pl. xxiii., figs. 1-13. 
1895. Pseudoconchwcia serrulata, Brady. A supplementary report on the Crustaceans of the Group 
Myodocopa obtained during the ‘Challenger’ Expedition (Trans. Zool. Soc., London, Vol. XIV., 
Part iii., 1897), p. 96, Pl. xvii., figs. 22-24. 
This is a widely distributed species, both in the Atlantic and Pacific Oceans 
(Claus). It occurred plentifully in many of the Plankton collections made during the 
voyage of the ‘ Challenger,’ but I do not find any distinct record of its occurrence in 
higher latitudes than 35° 41’ N. and 56° 54’ 8. It was found in very few of the 
