OSTKACODA COLLECTED IN THE SOUTH SEA ISLANDS. 499 



the level of the ventral margin, posterior obliquely truncated, the obliquity looking down- 

 wards, slightly convex and angulated both above and below ; dorsal margin highest in 

 front, flattened in the middle, then sloping very gently to the posterior extremity, just 

 in front of which it shows a short sinuation ; ventral margin slightly sinuated. Seen 

 from above, the outline is wedge-shaped, the greatest width equal to half the length and 

 situated near the posterior extremity, which is flattened, almost truncated, but widely 

 rounded at the angles ; from the widest point the sides converge almost in a straight line 

 forwards, showing a slight constriction just in front of the middle, and meeting rather 

 abruptly at the extremity. Shell-surface marked throughout with rather coarse im- 

 pressed puncta, and raised at the posterior extremity, so as to form a transverse ridge or 

 crest, which, in the dorsal view, is seen as a prominent angle. Only in some specimens, 

 however, is this ridge seen ; the figured specimen does not show it in the dorsal view. 

 Length '65 mm. 



Habitat. — Suva, mud-flats between tide-marks ; Levuka and Vuna Point, Taviuni, 

 between tide-marks ; Sava-Sava Bay, 4 fathoms ; Rambe" Island, between tide-marks ; 

 Loma-Loma, shore-sand ; Lufi-Lufi, Upolu, shore-sand. 



Cythere ovalis, G. S. Brady (Plate II. fig. 12). 



Cythere ovalis, Brady, " Ostracoda of Challenger Expedition," p. 66, pi. xiv. fig. 4 a-d. 

 Habitat. — Mango Island, 2-3 fathoms. 



Cythere caudata, n. sp. (PI. II. figs. 10, 11). 



Shell, seen from the side, oblong, subquadrate, more than twice as long as high. 

 Anterior extremity evenly rounded, posterior produced, forming a wedge-shaped pro- 

 jection, the apex of which is rounded off and situated below the middle line of the valve ; 

 dorsal and ventral margins nearly straight and parallel, the ventral very slightly sinuated. 

 Seen from above, oblong, subovate, three times as long as broad, sides parallel for the 

 greater part of their course, gradually converging from the anterior third to the subacute 

 extremity, dipping abruptly behind and terminating in a strong central mucro. Shell 

 surface marked with closely-set, small, oblong depressions, the long diameters of which 

 coincide with the long axis of the shell. Length - 46 mm. 



Habitat. — Sava-Sava Bay, Vanua Levu, 4 fathoms. 



Cythere Scotti, n. sp. (PL III. figs. 3, 4). 



Shell, seen from the side, subquadrate, higher in front than behind ; height equal to 

 rather more than half the length. Anterior extremity wide and boldly rounded, and 

 bearing a variable number of small fringing spines ; posterior imperfectly rounded, its 

 lower half slightly produced and bearing about six blunt marginal teeth ; dorsal margin 

 prominent over the anterior hinge, thence sloping gently backwards with a slight sinua- 

 tion, and rounded at its junction with the posterior extremity, ventral almost perfectly 



