274 Scientific Intelligence. 
Cyclas rivularis, Physa heterostropha, Lymnea elongata, Planorbis biea- 
rinata, P. lens, Valvata tricarinata (all of Say), along with fragments of 
Unios, and stems and limbs of trees. The specimens of Megalonyx bones 
are described in the Smithsonian Contributions by aoe wages Lignite or 
brown coal is not uncommon in the Quaternary depo: 
The — ao general features of the Coal tae are thus de- 
scribed : —p. 2 
“A very lee area of Kentucky is occupied by this, the most important 
of hela formations, in a practical point of view. There is, indeed, 
no State in the Union, except Kentucky, whose territory extends over a 
large area of two coal fields. 
In southwestern Kentucky the whole of eight counties and a 
of four other counties are embraced in the Middle coal field of the Mis. 
sissippi valley, or the coal field which lies partly in Ilinois, partly in In- 
Ap occupying the western 
slopes of the Alleghany mountains and the Cumberland range, situated 
y in Pennsylvania, Virginia, Ohio, Tennessee, and these above men- 
tioned eastern counties of Kentuc 
Of the hundred and three counties of this State, more than twenty-six 
counties may be considered as situated — the Coal Measures—or 0 
one quarter of the whole area of the Sta 
* The geological formations of the pailinindties coal field of Kentucky 
creek; thence nearly north to the mouth of ? Dismal * Bither an outlier 
or tongue of the coal measures appears to stretch away to the east, sie 
confines of Grayson and Hart counties, and even on to the waters 0 
ve coun 
Such are the general boundaries of this coal field, as far as at presen 
ascertained. All the territory included between this line and the oh 
ey ; 
ae ge ee eS en 
