494 DR G. S. BRADY ON 



always covered with closely-set impressed punctations. These are even more strongly 

 developed in very young than in older shells, where they tend to become obliterated by 

 calcareous deposit. The beak is generally distinct, but never very largely developed. 

 The anterior margin, and the posterior margin below the beak, are beset with short, 

 blunt teeth, which are usually irregular, as if broken away in places. The specimens 

 figured in the " Challenger" Report are probably rightly referred to this species, but being 

 all dredged in deep water, were old and worn shells deficient in surface ornament. Some 

 specimens of B.foveolata approach very closely B. Milne- Edwardsii, and I am not sure 

 that further research may not show that both forms belong to the same species. 



Bairdia Milne- Ed wardsii, G. S. Brady. 



Bairdia Milne-Edwardsii, Brady, " Ostracoda of Challenger Expedition," p. 56, pi. x. fig. 4 a-g. 

 Habitat. — Noumea, 2-4 fathoms; Levuka, between tide-marks, Loma-Loma, shore- 

 sand ; reef and shore-pools, Apia, Upolu ; Suva, pools inside reef. 



Bairdia ventricosa, n. sp. (PI. IV. figs. 17, 18). 



Shell, seen from the side, oblong, subrhomboidal, nearly equal in height throughout, 

 height equal to half the length. Anterior extremity rounded and very finely serrated 

 below the middle, posterior sloping very steeply and in an almost straight line below the 

 middle, then abruptly rounded off to the ventral margin, edge serrated ; dorsal margin 

 straight, ventral also straight and parallel with the dorsal. Seen from above, oblong, 

 subovate, with moderately arcuate sides and produced mucronate extremities, posterior 

 extremity more compressed than the anterior ; greatest width in the middle and equal to 

 half the length. Shell-surface marked throughout with closely-set, small, circular impres- 

 sions. Length '75 mm. 



Found in shore-sand from low- water, near Artillery Point, Noumea. 



Bairdia hirsuta (?) G. S. Brady. 



Bairdia hirsuta, Brady, " Ostracoda of Challenger Expedition," p. 50, pi. viii. fig. 3 a-d. 

 Habitat. — Port of Noumea, 3-4 fathoms. 



Bairdia Woodivardiana, G. S. Brady. 



Bairdia Woodwardiana, Brady, " Ostracoda of Challenger Expedition," p. 57, pi. xi. fig. 1 a-e. 

 Habitat. — Vuna Point, Taviuni, between tide-marks. 



Two empty shells of this very curious species were found. They agree very closely 

 with those figured in the " Challenger " Report, but are even more attenuated behind, and 

 one of them is decidedly more obtuse in front on the dorsal view. 



Bairdia truncata, n. sp. (PI. II. figs. 1, 2). 



Shell, seen from the side, oblong, irregularly angular, height equal to half the length. 



