512 DR G. S. BRADY ON 



straight, ending abruptly behind in a rectangular process. Seen from above, the outline is 

 much like that of a trilobite, very wide and rounded in front, and narrowing a little 

 towards the posterior extremity, which is wide and truncated, with a median triangular 

 beak ; width equal to more than two-thirds of the length. There is a slight median 

 prominence on the anterior margin, and a more or less distinct constriction of the lateral 

 margins in front of the middle, each side ending behind in an acutely-produced angle. 

 The surface of the shell is very irregularly rugose and nodulated. End view quadri- 

 lateral, base very wide and prominent in the middle, apex wide and obliquely truncated, 

 sides moderately convex, width greater than the height. Length *5 mm. 

 Habitat. — Banc de l'Aiguille, New Caledonia, dredged in 2-3 fathoms. 



Genus Cytherideis, Jones. 

 Cytherideis baculoides, n. sp. (PI. III. figs. 11, 12). 



Shell, seen from the side, elongated, oblong, equal in height throughout, height equal 

 to not much more than one-fourth of the length. Anterior extremity suddenly depressed, 

 rounded off, almost angulated below ; posterior evenly rounded ; dorsal and ventral 

 margins parallel and perfectly straight. Seen from above, compressed, fusiform, more 

 than four times as long as broad, acuminate in front, rounded off behind. Shell pellucid, 

 smooth, with a few minute, scattered, dot-like hairs. Length '75 mm. 



Habitat. — Levuka, between tide-marks ; Sava-Sava Bay, Vanua Levu, 4 fathoms. 



Fam. Paradoxostomatid^:. 



Genus Paradoxostoma, Fischer. 

 Paradoxostoma overturn, n. sp. (PI. III. figs. 32, 33). 



Shell, seen from the side, ovate, highest behind the middle, height equal to half the 

 length. Anterior extremity narrow, evenly rounded ; posterior obscurely angulated in 

 the middle ; the dorsal margin is boldly arched, and forms a continuous curve to the 

 angulation of the posterior extremity, sloping steeply behind and very gently in front ; 

 ventral margin very slightly sinuated in front, boldly convex behind, and continuous with 

 the posterior extremity. Seen from above, compressed, fusiform, widest in the middle, 

 more than three times as long as broad, extremities equal and acuminate. Surface 

 smooth, colour greenish, with a dark mottled band in the middle. Length '5 mm. 



Heibitat. — Between tide-marks, Vuna Point, Taviuni ; and Levuka, north of the town. 



Paradoxostoma NoveB-Caledonice, n. sp. (PL IV. fig. 19). 



Shell, seen from the side, elongated, subovate, highest rather behind the middle, 

 height equal to rather less than half the length. Anterior extremity narrow, evenly 

 rounded ; posterior scarcely rounded, subangular ; dorsal margin rather boldly arched, 

 highest behind the middle, thence sloping with a steep curve backwards and much more 



