508 DR G. S. BRADY ON 



Loxoconcha gibbera, G. S. Brady (PI. IV. figs. 27, 28). 



Loxoconcha gibbera, Brady, Linn. Soc. Journal, "Zoology," vol. xix. p. 312, pi. xl. figs. 19-21. 



Habitat. — Mango Island, fringing reef. 



The figures given with the original description of this species are so inaccurate that I 

 have drawn it afresh for this memoir. The illustrations now given may be taken as 

 good representations of the type. 



Genus Xestoleberis, G. 0. Sars. 

 Xestoleberis curta, G. S. Brady. 



Xestoleberis curta, Brady, " Ostracoda of Challenger Expedition," p. 126, pi. xxxi. fig. 6 a-d. 

 Habitat. — Noumea, in shell-sand, and dredged in 2-6 fathoms ; Mango Island, 

 fringing reef ; Lufi-Lufi, Upolu, reef and shore-pools. 



Xestoleberis variegata, G. S. Brady. 



Xestoleberis variegata, Brady, "Ostracoda of Challenger Expedition," p. 129, pi. xxxi. fig. 8 a-g. 



Habitat. — Noumea, dredged in 2-6 fathoms ; Suva, mud-flats ; Levuka, between tide- 

 marks ; Sava-Sava Bay, Vanua Levu, 4 fathoms ; Yuna Point, Taviuni, between tide- 

 marks ; Eambe Island, between tide-marks ; Loma-Loma, in shore-sand ; Apia and Lufi- 

 Lufi, Upolu, reef and shore-pools, and in shore-sand. 



Shells which I refer to this species are very abundant in almost all these gatherings. 



Xestoleberis granulosa, G. S. Brady. 



Xestoleberis granulosa, Brady, " Ostracoda of Challenger Expedition," p. 125, pL xxx. fig. 5 a-d. 

 Habitat. — Port of Noumea, 3-6 fathoms. 



Xestoleberis tumefacta* G. S. Brady (PI. III. figs. 7, 8). 



Xestoleberis tumefacta, Brady, "Ostracoda of Challenger Expedition," p. 128, pi. xxxi. fig. 4 a-d. 

 Habitat. — Noumea, 2-4 fathoms. 



Xestoleberis gracilis, n. sp. (PI. III. figs. 9, 10). 



Shell, seen from the side, elongated, greatest height in the middle and equal to less 

 than half the length. Anterior extremity much depressed, narrow and almost angular, 

 posterior rounded; dorsal margin sloping with a gentle curve in front, evenly arched 

 behind, ventral margin almost straight. Seen from above, the shell is ovate, widest 

 behind the middle, width equal to fully half the length, tapered from the middle and 

 acutely pointed in front, widely rounded behind. Shell quite smooth. Length "42 mm. 



Habitat. — Lufi-Lufi, Upolu, reef and shore-pools. 



Genus Cytherura, G. 0. Sars. 



Cytherura marcida, n. sp. (PI. III. figs. 24, 25). 



Shell of the male (?), seen from the side, rhomboidal, height the same throughout, and 



* The figures here given are taken from a specimen of extreme tumidity, but which seems to possess no characters 

 sufficient to separate it from the ordinary form. 



