112, T. R. JONES ON FORAMINIFERA AND OSTRACODA 
5. CYIHERIDEA SUBPERFORATA, Sp. Nov., see above, p. 768. (PL. 
XXXIV. figs. 25, 26.) 
Two specimens (represented here by the best, fig. 26). Trian- 
gular-ovate. Right valve the smallest, overlapped by the other 
nearly all round, especially on the dorsal and ventral edges. Sur- 
face smooth and shining, but pitted; in one specimen the pitting 
is delicate, in the other (fig. 26) coarse. 
6. CyTHERE? TENELLA, sp. nov. (Pl. XXXIV. fig. 24.) 
One specimen; very smail and delicate; translucent; oblong, 
slightly oblique, with rounded ends. 
7. CyTHERE GUEMBELIANA, sp. noy. (Pl. XXXTYV. figs. 31, 32, 33.) 
Several specimens, differmg much in development. Generally 
ovate-oblong, somewhat oblique, or subquadrate. Convex, with 
surface shining, but impressed with a coarse reticulation, in some 
cases faint. The cross meshes make faint or strong wrinklings; 
and the longitudinal ridges often get strong on the ventral region. 
Oblique transverse imprints are more or less marked on the dorsal 
region (see especially fig. 33), with a central roughish round pit-like 
mark. The two extremes are figured. This species is named after 
Dr. OC. W. Giimbel, F.M.G.8., of Munich, who has discovered and 
described many Jurassic microzoa. 
8. CYTHERE DRUPACEA, sp. nov. (Pl. XXXIV. fig. 30.) 
A specimen of the peach-stone form; convex, with full ventral 
region, arched back, tapering posterior and obliquely rounded ante- 
rior border. It has a coarse but faint wrinkling, with an inclina- 
tion to strengthen some of the longitudinal lines. The wrinkles are 
oblique on the ventral region. 
9, CrrHere (CYTHEREIS) QUADRILATERA, Romer (see above, p. 766). 
(Pl. XXXIV. figs. 39, 40, 41.) 
Two specimens (figs. 40, 41). Smooth, glossy, with scattered 
spots, like the bases of small prickles; end-borders slightly den- 
ticulate ; and the ridges, medial and marginal, more or less tuber- 
culate, especially in these older (larger) individuals. 
10. Cyrupre BrakEana, sp.nov. (Pl. XXXIV. figs. 34, 35.) 
Two valves; suboblong, obliquely rounded in front, narrower and 
rounded behind; anterior hinge-joint rather prominent; surface 
coarsely reticulate, meshes stronger and straighter on the ventral 
region. This approaches the young forms of Cythere dictyon, 
G. S. Brady, ‘Challenger Report,’ p. 99, pl. 24. Our specimens are 
named after the Rev. Prof. J. F. Blake, F.G.S., who has elucidated 
many Ostracoda of the Lias. 
11. Cyruere Braprana, sp. nov. (Pl. XXXIV. figs. 38 a, 38 6.) 
Seven valves of a suboblong form, reticulate and costated; 
reticulation sometimes finer (fig. 38a). The longitudinal meshes 
are developed into three or more subparallel ribs or ridges, joining 
