Prof. T. Rupert Jones—Fossil Ostracoda from U. States. 389 
Jones, and M. Bradyi, Jones (Guou. Maca. 1886, Pl. IV. Fig. 1 and 
Fig. 2); it is, however, smaller, relatively shorter, plumper, and 
less strongly constricted across the middle than M. Bradyi; and 
smaller, longer (relatively), and more oblong than M. Forbesii ; its 
transverse sulcus, also, is quite medial, and not at the anterior third 
as in the latter. Being thus quite distinct, although related, it may 
have the new specific name of M. consobrina. The surface has a 
_ shallow, irregular pitting. 
From the Bear-River Formation ; Cokeville, 8.-W. Wyoming. 
9. MuTacyPRIS CUNEIFORMIS, sp. nov. Pl. XV. Figs. 3a, }, c. 
Length -65, height -35, thickness -3 mm. 
Oblong; compressed anteriorly, convex behind; almost straight 
on the parallel dorsal and ventral borders, the former compressed 
and sharp, the latter deeply sunken, giving a sagittate outline to the 
end view (Fig. 3c.) of the carapace, whilst the dorsal view (Fig. 3b.) 
is lanceolata. The ends are rather obliquely, and unequally rounded. 
Having much of the appearance of an oblong wedge, this species 
may be conveniently termed M. cuneiformis. The surface does not 
show any marking. 
From the Bear-River Formation ; Cokeville, S.-W. Wyoming. 
10. Meracypris simpLex, sp. nov. Pl. XV. Figs. 9a, b, ¢. 
Length °4, height -2, thickness -2 mm. 
Suboblong, but broader (higher) at the anterior third than behind, 
both ends truncate; the front slightly oblique, and the hinder end 
gently rounded. The valves are convex; edge view, acute oval ; 
end view, broadly cordate (reversed). 
This is smaller, less truly oblong, and more uniformly convex 
than M. cuneiformis, and has to be regarded as a distinct species. 
The surface is faintly reticulate. 
‘From the Bear-River Formation ; Cokeville, S.-W. Wyoming. 
The known species of Metacypris are :— 
MM. glutea (Egger.). Neues Jahrb. etc. 1858, p. 408, pl. i. fig. 6. 
IM. strangulata,’ Jones, Q. J. G. S. vol. xvi. 1866, p. 187, fig. 73. 
Wf. cordata, Brady and Robertson, Ann. Mag. Nat. Hist. ser. 4, vol. vi. 1870, 
p- 20, pl. vi. figs. 1—9; and Trans. R. Dublin Soe. n.s. vol. iv. 1889, 
p- 123, pl. xiv. figs. 3—12. 
M. Forbesii, Jones, and var. verrucosa, Jones, Q. J. G. S. vol. xli. 1885, p. 345, 
pl. vii. figs. 11—13. 
M. Bradyi, Jones, Grou. Mac. 1886, p, 146, Pl. LV. Fig. 2. 
M. Whiter, Jones, loc. cit. Fig. 3. 
IM. Fittoni (Mantell), Jones in Prestwich’s ‘‘ Geology,” vol. ii. 1888, p. 263, 
fig. 137@; and Grou. Mae. 1888, p. 539. 
VI. Cyruere, Miiller, 1785. 
11. CyrHere monticuna, sp. nov. Pl. XV. Figs. Ida, b. 
Length 6, height -35, thickness -6 mm. 
Looking for published species showing definite alliance in form 
to this specimen, Limnicythere, a brackish genus presents itself; but 
there is no real ground for regarding relationship to exist. Cythere 
1 Cypris conculeata, Jones, Q.J.G.S., vol. xvi. 1866, p. 266, fig. 3, is not a 
Metacypris for certain. 
