3886 Prof. T. Rupert Jones—Fossil Ostracoda from U. States. 
Mr. F. H. Knowlton (in the “ Botanical Gazette,” vol. xvili. p. 141, 
figs. 1-8), as Chara Stanton. It has much of the appearance of 
some of the Chare found in the Oligocene beds of the Isle of Wight. 
Various species of Pyrgulifera, Corbula, Unio, Limnea, and Neritina, 
are found as siliceous casts with the Chara. 
Dr. White has also sent to me a piece of shale containing Ostracoda 
with their tests preserved, but very fragile; this specimen was 
from the Montana Formation, near the top of the Upper Cretaceous 
Series, at Coalville, Utah, about 40 miles from Salt-Lake City. 
Some examples are illustrated by Figs. 10, 14, and 16, belonging 
to brackish- or, more probably, fresh-water genera. oa 
Laramie Formation. 
<Place of the shale from Utah. 
UPPER Montana Formation. 
CRETACEOUS Ghiksaia Wass 
Re olorado Formation. 
(Place of the specimens obtained by dissolving 
Bear-River Formation. {the impure limestone from S.-W. Wyoming. 
Dakota Formation. 
Some of the specimens from S.-W. Wyoming, now figured, 
remind us of those from Colorado, above-mentioned; others are 
different; but nearly all appear to represent either freshwater or 
estuarine forms; and are thus in accord with the other known 
fossils of the Upper Cretaceous beds from which they have come. 
The selected specimens are described in their natural order 
according to the classification of the Ostracoda. 
§ 2. Description of the Species. 
I. Cypris, Muller, 1785. 
1. Cypris Purseckensis, H. Forbes. Pl. XV. Figs. 15a, 156. 
Quart. Journ. Geol. Soc. vol. xli. 1885, pp. 347-8, pl. 9, figs. 1-6. 
Length °5, height -3, thickness -15 mm. 
Fig. 15ais referable to Cypris Purbeckensis, being like figs. 3-0 of 
those figured and described in 1885 (op. cit.); it is, therefore, 
evidently equivalent to figs. 5a, b, ¢, Pl. IV. Guou, Mae. 1886, 
p. 147, illustrating the same form from Colorado. 
From the Bear-River Formation ; Cokeville, 8..W. Wyoming. 
II. Cypripna, Bosquet, 1882. 
Quart. Journ. Geol. Soc. vol. xli. 1885, p. 336. 
2. CyrRIDEA TUBERCULATA (Sowerby, op. cif. p. 342), var. 
Wyromincensis, nov. PI. XV. Figs. 5a, b; 6a, 0. 
Fig. 5. Length -95, height °6, thickness -35 mm. 
Fig. 6. 1:05, -6, ——_——__ ‘4 mm. 
This comes very near to Cypridea tuberculata (Sow.), var. adjuncta, 
Jones (op. cit. p. 342, Pl. VIII. Figs. 22-24), but its antero-dorsal 
angle (anterior hinge) is stronger, giving a more pronounced slope 
to the dorsal border ; its notch and hood are stronger ; its tubercles 
are not so strong; the valves are not so convex, hence the edge- 
