504 DR G. S. BRADY ON 



The figures here given show a shell with the spinous armature pretty well developed, 

 but in some the squamous, pointed character of the central and dorsal spines is much 

 more apparent. 



Cythere quadriserialis, n. sp. (PI. II. figs. 27, 28). 



Shell, seen from the side, oblong, subquadrate, much higher in front than behind, 

 height equal to more than half the length. Anterior extremity broad and boldly rounded, 

 posterior much narrower, subtruncate or only moderately rounded, dorsal margin sloping 

 steeply backwards, ventral almost straight. Seen from above, the outline forms a very 

 irregular oblong, more than twice as long as broad, and widest behind the middle; very 

 slightly narrowed towards the extremities, which are wide and truncated, the anterior 

 deeply emarginate, margins extremely spinous and irregular. The surface of the valves 

 shows a central convex area, encircled, except on the dorsum, by a wide, thickened flange 

 or lip, which is everywhere bordered by short, closely-set, blunt teeth ; the anterior margin 

 terminates above in a strongly-developed spine or group of spines, and behind this, on 

 the dorsal margin, are three widely-detached groups of very large and strong spines, each 

 group consisting of about three coalescent spines ; the central area of the valve is marked 

 by two oblique ridges, composed of semi-detached bosses or tubercles, the upper rib 

 being divided into two portions by a median gap. Length "85 mm. 



Habitat. — Noumea, in shore-sand, and dredged in 3-6 fathoms. 



A very distinct and remarkable species, no two specimens of which are exactly alike. 

 The specimen figured exhibits a strongly-developed dorsal armature, but the ridges of the 

 central area are not so continuous or so well marked as in many. 



Cythere militaris, G. S. Brady (PI. II. figs. 24-26). 



Cythereis militaris, G. S. Brady, On new or imperfectly known species of Marine Ostracoda 

 {Trans. Zool. Soc, vol. v. p. 385, pi. lxi. fig. 9, a-d). 



Shell of the female, seen from the side, oblong, subquadrangular, highest in front, 

 height equal to more than half the length. Anterior extremity wide and well rounded, 

 posterior also rounded, but narrower ; dorsal margin sloping in a right line from the front, 

 ventral straight. The central portion of the valves is smooth, convex, and bears three 

 longitudinal rows of strong, blunt spines ; the middle row extends almost the whole 

 length of the shell, but is interrupted in the middle ; the upper and lower rows are much 

 shorter, each about one-third of the length of the valve, and placed just within the mid- 

 region of the dorsal and ventral margins. This central area is bordered in front and 

 behind by a thick, encircling lip, and the entire circumference is fringed with strong 

 spines, which on the anterior and ventral margins are usually short and squared, but on the 

 posterior and dorsal margins, especially at the infero-posteal angle, are developed in fully 

 grown shells into long, sharp, curved spines. Seen from above, the outline is oblong, 

 widest behind the middle, with broad, truncated, and spinous extremities. The shell of 



