132 
Aug. F. Foerste 
whitish limestones, a variety of Clitambonites with finer and more 
numerous radiating striae than usual is present. The specimens 
are broader and much more finely striated than Clitambonites 
diversus, Shaler (plate X, Fig. 13). They probably are more 
closely related to Clitambonites americanus, Whitfield, from the 
Prosser limestone of Wisconsin and Minnesota, than to the 
Anticosti species; however, these Danville specimens are more 
finely striated and broader also than specimens from the Prosser 
horizon. The distinction is one likely to appeal only to the 
stratigraphical paleontologist . 
Orthorhynchula linneyi, Janies 
{Plate XI, Fig. 5) 
The Upper Birdseye beds of Linney included both the fine- 
grained, in part dove-colored limestone overlying the Paris bed, 
in Mercer and Boyle counties, Kentucky, and also the still higher 
strata, containing Stro7natocerium, Dinorthis ulrichi, Strophomena 
vicina, Hebertella frankfortensis and Rhynchotrema inaequivalve, 
for which the term Cornishville bed was proposed recently. The 
Perryville member includes that part of the Upper Birdseye 
limestone of Linney which lies below the Cornishville limestone. 
Usually it may be divided into two parts. The upper, between 
5 and 8 feet thick, is very fine-grained, more or less dove-colored, 
with small, translucent spots, and with relatively few fossils. 
The lower part, from 15 to 20 feet in thickness, frequently is 
darker, and softer, and more fossiliferous. About 1 mile west 
of Nevada, these lower layers are richly fossiliferous, and are 
supplied with silicified gasteropods and excellently preserved 
valves of Cyrtodonta. Tetradium is widely distributed at this 
horizon. Farther eastward, especially between Danville and 
Harrodsburg, along the railroad, this lower part of the Perry- 
ville is even more richly supplied with silicified fossils, and the 
rock is whiter, and less distinguishable from the so-called dove- 
colored limestones at the top. Should any separate designation 
for the lower layers with the silicified fossils be desirable, the term 
Faulconer limestone will serve. The Perryville limestone thins 
out northward and northeastward before reaching the Richmond 
sheet of the United States Geological Survey, from which the 
Flanagan chert was described. At Flanagan, the Flanagan chert 
