766 T. R. JONES ON FORAMINIFERA AND OSTRACODA 
Oristellaria, in which the chambers are few and ventricose, in- 
creasing rapidly in size. The last chamber is set on nearly straight, 
not in a spiral direction. The septal lines are depressed. Pl. XXXIV. 
fig. 7. This matches some varieties allied to Marginulina simplex, 
D’Orb., Cristellaria mirabilis, Reuss, &c. 
In this limited group of Foraminifera ($ I.), there is nothing 
especially characteristic. These forms range through the Secondary 
and Tertiary formations to the Recent Period. Indeed Cristellaria* 
is of Silurian occurrence, and Haplophragmium is known in the 
Carboniferous rocks. 
2. ENToMoSTRACA (OSTRACODA),. 
1. Macrocypris Braprana, sp. nov. (Pl. XXXIV. fig. 23.) 
Smooth, subelliptical, with an obliquely tapering posterior end, 
and the dorsal edge more convex than the other. ‘Two specimens, 
one larger than the other ; the former shows the outside (fig. 23), 
and the other the inside of a valve. 
In shape this is near to, but more oblong than, MW. tumida, G. S. 
Brady, ‘ Report on the Ostracoda of the ‘“ Challenger” Expedition,’ 
p. 43, pl. 6. fig. 2. 
2, CYTHERE SCHWAGERIANA, Sp. nov. (Pl. XXXIV. fig. 27.) 
One valve. Smooth, subovate, somewhat of the peach-stone 
shape ; more convex on the dorsal than on the ventral border, the 
hinge-joint being slightly prominent. The ventral region is convex, 
slightly bulging over its border. 
The name of Dr. Conrad Schwager, who has described many 
Jurassic Microzoa, is associated with this species. 
3. CYTHERE JUGLANDICA, sp. nov. (Pl. XXXIV. figs. 36, 37.) 
Three specimens. In shape somewhat like a long peach-stone ; 
coarsely reticulate, and rough like a walnut-shell; the meshes more 
elongate on the ventral region. 
The kind of reticulation here seen is met with in Oythere of dif- 
ferent shapes, fossil and recent. In the specimens under notice, 
and among others from other parts of the deep boring at Richmond, 
there is considerable variation in the strength or depth of the coarsely 
sculptured network ornament of the valves. 
4, CyrrHere (CYTHEREIS) QUADRILATERA, Romer. (Pl. XXXIV. 
figs. 39, 40, 41.) 
One valve (fig. 39), irregularly oblong in outline, the anterior 
hinge-joint standing out on the dorsal margin. Bordered all round 
with a raised smooth rim of varying thickness, thickest at the 
antero-dorsal margin. Ridged medially, from the anterior third 
* ©. rotulata has been figured by Mr. E. O. Ulrich from the Lower Silurian 
of Cincinnati (Journ. Cincinn. Soc. Nat. Hist. vol. v. (1882 ?), p. 119, pl. 5, 
figs. 1, 1), and M. O. Terquem has noticed a Cristel/aria from the Devonian of 
Pattrath (Bullet. Soc. Geol. Fr. 3, viii. p. 414, &c., 1880). 
Ee 
