500 DR G. S. BRADY ON 



Cytheridea jiavescens, n. sp. (PI. II. figs. 29-32). 



Shell of the female, seen from the side, subreniform, greatest height in the middle 

 and equal to half the length, wide and evenly rounded in front, obliquely rounded behind, 

 the obliquity looking upwards ; dorsal margin gently arched, ventral slightly sinuated 

 in front of the middle. Seen from above, ovate, well rounded behind and subacutely 

 pointed in front, more than twice as long as broad. Shell-surface smooth, yellowish, with 

 darker clouded patches, bearing numerous distant, circular papillae, and marked on the 

 anterior, posterior, and ventral margins with short radiating hair-like lines. The shell of 

 the male is more elongated, lower, and has the postero-ventral angle more pronounced- 

 Length of the male, *8 mm. ; of the female, '75 mm. 



Habitat. — Port of Noumea, 2-6 fathoms ; Levuka, between tide-marks ; Sava-Sava 

 Bay, Vanua Levu, 4 fathoms. 



Cytheridea consobrina, n. sp. (PI. III. figs. 5, 6). 



Shell of the male, seen from the side, oblong, subovate, rather higher in front than 

 behind, height equal to half the length. Extremities rounded, the posterior somewhat 

 flattened, and bearing at its lower end a single strong, backward-pointing spine ; dorsal 

 margin slightly arcuate, sloping gently downwards from near the front ; ventral margin 

 almost straight. Seen from above, the outline is ovate, about twice and a half as long as 

 broad, and with subparallel sides ; obtusely pointed in front, rounded off behind. Shell- 

 surface marked with closely-set subcircular excavations. Length 1 mm. The shells of 

 the two sexes are alike in size, but that of the female is higher in proportion, and its 

 posterior half is very tumid. 



This species is in shape and general appearance of both sexes not unlike the common 

 Cytheridea torosa of Europe, but differs very decidedly in the character of its surface 

 markings, the fossae being much larger; the shell also is more elongated, and in the 

 female much more tumid behind. It was found plentifully in shore-sand from near low- 

 water mark at Noumea. 



Genus Loxoconcha, G. 0. Sars. 



Loxoconcha gracilis, n. sp. (PI. IV. figs. 24-36). 



Shell of the male, seen from the side, oblong-ovate, height equal to rather more than 

 half the length. Anterior extremity well rounded, posterior obliquely truncated above 

 the middle, rounded off below ; dorsal margin straight, ventral sinuated in front. Seen 

 from above, compressed, ovate, more than twice as long as broad, widest in the middle, 

 tapered gradually to the acute anterior extremity, abruptly towards the posterior, which 

 is strongly mucronate. The shell of the female is shorter, and has a strongly-arched 

 dorsum. Surface marked with closely-set rounded pits and a few distant circular papillae. 

 Length of the male, '65 mm.; of the female, '55 mm. 



Habitat. — Noumea, in shore-sand, and dredged in 2-6 fathoms ; Suva, mud-flats and 



