Sketch of the Geological History of Licking Co. — N o. 2. 
Additional Fossils from Coal Measures at Flint Ridge. 
(Plate XIV.) 
Opportunity has been afforded to examine a few additional speci- 
mens from the shale above the cannel coal at Flint Ridge, among 
which are the following : 
1. Lingula scotica., Day. (var.^) (Plate XIV, Fig. 15.) 
Our only specimen is a fragment, agreeing pretty closely with the 
form from the Waverly identified with this species by Meek (Pal. O. 
Vol. II, p. 276. ) If Meek’s figure is accurate the Waverly species 
has quite a different outline from the Scottish, as figured by Davidson, 
(Carb. Brach. vol. IV, part III, plate XVIII, Fig. 5. ) The latter 
also says, “ Beak extremely attenuated and acutely pointed at its ter- 
mination.” L. scotica, var. nebrascensis., Meek, though much smaller, 
has more distant striae. It is probable, judging from the fragment, 
that our specimen had nearly the form of the European. 
2. Lingula umbonata.^ Cox. (?) (Plate XIV, Fig. 2.) 
The species resembles some varieties of Z. squamiformis., Phillips, 
while Z. 7 nelie H., as figured from the Waverly by Meek, resembles 
closely some forms of Z. mytiloides. Sow. Specimens of L. melie in 
our collection, however, show the very prominent mesial ridge char- 
acteristic for that species. L. tighti, from the cannel coal a few feet 
below the present horizon, unless all specimens examined were dis- 
torted, differs very greatly in outline, (see Plate IV, Fig. 5.) In size 
specimens under consideration agree exactly with the Indiana speci- 
mens of L. umbonata, but are proportionally wider, especially above 
the middle, 
3. Discina co^ivexa., Shumard. (Plate III, Fig. 9. ) 
