310 THE CHICAGO ACADEMY OF SCIENCES. 
MARL. 
ArRIzONA: Coconino Co. (Dall). 
Urau: Lake Bonneville, in white marl (Gilbert); near Salt Springs 
Creek (Call). 
INTERGLACIAL BEDS. 
New York: West side Cayuga Lake, Tompkins Co. (Murray). 
Ontario: Don Valley, near Toronto (Coleman). 
Various DEpositTs. 
UNITED STATES. 
CALIFORNIA: Branch of Walnut Creek, near Livermore, Alameda Co.; 
Walnut Creek, Contra Costa Co. (Cooper). 
Intinors: Worth, Cook Co., in old lake deposit (Baker); In beach at 
Evanston (Marcy). 
Missourt: Belleview, Iron Co., and Lexington, La Fayette Co. (Swallow). 
NeprAsKA: Along banks of Missouri River, in lacustrine deposits 
(Aughey) ; Bluff City landing, below mouth of Platte (Swallow). 
NevapA: In estuary of highest Lahontan beach; Brown’s, Washoe Co.; 
stratified gravels of Mill City, Humboldt Co.; Middle Lahontan (Call). 
Texas: Three miles east of Kiowa Peak, Stonewall Co.’; forks of Groes- 
beck Creek, Hardeman Co.,’; Tule Canyon, Swisher Co. (Singley). : 
Utau: Surface of Sevier Desert, Millard Co. (Call). 
BRITISH AMERICA. 
New Brunswick: Sawler’s Lake, St. John, St. John Dist. (Dall). 
Ontario: Upper drift deposits, Nottawasaga River, near Angus Station, 
Simcoe Dist. (Chapman) ; Iroquois Beach, from dune-like sand plain near To- 
ronto, York Dist. (Coleman). 
1As these records are apparently outside of the present range of the 
species, the full description of the localities is appended. (See Geol. Surv. 
Texas, IV, pp. 184, 185.) 
1“This locality is about three miles west of the town of Quanah, in Harde- 
man County. Groesbeck is a tributary of the South Fork of Red River. The 
south fork of the creek heads southwestward from the town of Quanah, and, 
after forming a junction with the north fork, flows into the river a few miles 
northeast of that town. The north branch has its source a little west of 
Quanah, and flows almost east to its confluence with the south branch, Both 
streams are fed by constantly flowing springs, rising from the massive gyp- 
sum beds which underlie the whole country. 
“The limestone hills on both sides of the creek, near the junction of the 
two branches, rise to the height of forty or fifty feet above the creek valley, 
which is in places a mile or more in width. The creek has cut a channel 
through this valley, which was the former flood plain, down into the massive 
gypsum to the depth of twenty-five feet, and this channel, which is about 100 
feet wide, now constitutes the flood plain of the stream, the water being con- 
fined to a still deeper and narrower channel except at flood times. 
“At the top of the old flood plain, twenty-five feet above the present stream, 
is the horizon at which the material was taken containing the shells men- 
tioned as coming from the Forks of Groesbeck. The bed also contains parts 
of fossil vertebrates, among which’ may be mentioned an elephant, horse, and 
keaver, with others not yet determined. 
“Tt is evident that at one time there was much more water flowing down 
this valley than at present, and that it spread out in a broad sheet. This must 
have continued for quite a while as the drift material is often ten to twelve 
feet thick. This locality is west of the Seymour plateau. 
*“This locality is in the northeastern corner of Stonewall County, on the 
east side of the Brazos River, and near the road at the crossing of the river, 
‘he bluff on the river at this place, on the east side, is about thirty feet high, 
composed of drift material. The beds from which the shells were taken is a 
bluish clay, situated about ten feet below the top of the bluff and extending 
several hundred yards along a hollow running back from the river. I also 
saw the same clay in several other gulches running into the river. This ma- 
terial was different from that composing the bluff of the river, which is a red 
sandy loam, and seems to have been deposited against the older blue clay bed.” 
