768 T. R. JONES ON FORAMINIFERA AND OSTRACODA 
3. CYTHERIDEA SUBPERFORATA, sp. nov. (Pl. XXXIV. figs. 25, 26.) 
Two specimens (fig. 25, and a broken valve). Smooth; subovate 
but rather long; obliquely rounded in front, the antero-dorsal 
border sloping ; rounded posteriorly ; dorsal border subangular at 
the front joint; hinge-line oblique, but straight; ventral border 
nearly straight. Closely allied to C. perforata (Romer), which is a 
Cretaceous species. 
4, CYTHERE SUBCONCENTRICA, sp. nov. (Pl. XXXIV. figs. 28, 29.) 
Six or seven specimens. Small and plump; of the peach-stone 
pattern ; smaller and rather smoother than C. concentrica, Reuss,. 
which is not rare in the Chalk. It is faintly marked with a linear 
subconcentric reticulation, or shallow elongate pittings, particularly 
on the ventral region. It reminds us of the species just mentioned, 
and, at first sight, of its smooth variety virginea. See Monogr. Cret. 
Entom. Pal. Soc. 1849, p. 11, pl. 1. fig. 2; and Geol. Mag. vol. vii. 
p. 74. One specimen shows minute spots, like the bases of prickles. 
5. CYTHERE JUGLANDICA, see above, p. 766. (Pl. XXXIV. figs. 36, 
37.) 
Two specimens of this well-defined Cythere of the peach-stone 
type; convex, suboblong or subquadrate, and rugose, being coarsely 
reticulate like a walnut-shell, with the meshes more elongate on 
the ventral region. 
6. CYTHERELLA SYMMETRICA, sp. nov. (Pl. XXXIV. fig. 42.) 
Symmetrically oblong-oval, or oblong with rounded ends; edge- 
view subcuneiform; delicately pitted; subcentral sunken spot 
present. 
There are many oblong Cytherelle, and some of them closely 
approach this form. C. fraterna (Reuss), from the Trias, is the 
nearest, but is not so perfectly symmetrical in outline; so also 
the recent C. scotica, G. S. Brady; but this is rather contracted 
medially. Among the many published figures of the Cretaceous 
C. Muenstert (Romer), some nearly match our specimen. C. paral- 
lela, Reuss, is symmetrical, but too narrow. For a list of the 
published Cuther elle, and for a classification of the species, see the 
é Monograph of the Carboniferous Cypridinide and their Allies ’ 
(Paleeontographical Society), 1884 (now in the press). 
The Cytherella under notice may well be named C. symmetrica. 
7. A small Cythere (?) or short Bairdia (?), obscure ; and a broken 
solid carapace of a Cytherella? : 
Of the Foraminifera and Ostracoda from 1151’ to 1151! 6" (§ IL), 
the former are Cristellariew, of no special geological horizon ; and 
some of the latter have a Cretaceous aspect, but these are associated 
with less marked species. : 
