38 Cincinnati Society.of Natural History. 
Pliocene of the Niobrara river, Merychocherus rusticus ; from Dry 
creek, Stanislaus county, California, Mastodon shepardi ; and from 
Tuolumne county, Auchenta californica. 
Prof. O. C. Marsh* described, from the Eocene of New Jersey, The- 
cachampsa minor; from the Miocene of Edgecombe county, North Car- 
olina,t Catarractes antiquus; from Maryland, Puffinus conradi; from 
the Niobrara river, Grus haydeni, Graculus idahensis; from Squan- 
kum, New Jersey,{ Rhinoceros matutinus; from Shark river, Dicotyles 
antiquus; and from the Pliocene at Monmouth, Meleagris altus. 
Prof. F. B. Meek described, from the Miocene, at Fossil Hill, Hot 
Spring mountains, Idaho, Spherium rugosum, S. idahoense, Ancylus 
undulatus, Goniobasis sculptilis, G. subsculptilis, Carinifex binneyt, C. 
concava and C. tryoni. 
T. A. Conrad§ described, from the Miocene of Virginia and South 
Carolina, Artena undulata, Crepidula rostrata, C. recurvirostra, C. 
virginica, Persicula ovula, aud Axinea bella. 
The Grand Gulf Group of Louisiana|| consists of nonfossiliferous 
clays and sandstones pretty regularly stratified, varied, occasionally, by 
clayey sand and beds containing twigs and leaves. The sandstone oc- 
curs in ledges from six inches to 20 feet in thickness. It is cut into 
four parts by the bluff and the alluvion of Red river and the Missis- 
sippi. One reaches the Vicksburg area and extends into Missis- 
sippi; another is southwest of Red river and extends into Texas; an- 
other is northeast of Red river as far as Sicily Island on the Ouachita; 
and the other is at the western part of the Avoyelles prairies. 
In 1871, T. A. Conrad@ described, from the Eocene at Claiborne, 
Alabama, Caryatis exigua; and from the Oligocene at Vicksburg, 
Mississippi, Macoma sublintea, and Abra protexta. 
F. B. Meek** described, from the Bridger Eocene at Henry’s Fork, 
Black’s Fork, and Church buttes, Wyoming, Viviparus wyomingensis. 
Brady and Crosskeyt++ described, from the Post-pliocene of Port- 
land and Saco, Maine, and from Montreal, Canada, Cythere mac- 
chesneyi, C. loganit, C. cuspidata,. Cytherura cristata, C. granulosa, 
and Oytheropteron complanatum. 
* Am. Jour. Sci. and Arts, 2d series, vol. 50. 
+ Ibid, vol. xlix. 
t Proc, Acad. Nat. Sci. 
§ Am. Jour. Conch., vol. vi. 
|| Geo. of Lou., 1871. 
7 Am. Jour. Conch., vol. vi. 
** Proc. Acad. Nat. Sci. 
t+ Lond. Geo. Mag., vol. viii. 
