io8 
U I rich on Correlation of the Lower Siluriai 
and the rains have served to wash out many interesting- fossils 
from the clay, which still partly covers them. They are rather 
coarsely silicified, causing all the finer details of structure to be 
destroyed. Still they are usually in a sufficiently good condi- 
tion to render their identification comparatively easv. Among 
others the following should be mentioned: 
Receptaculites occideiitalis Salter. 
Sfrcpfclasma cortiictilum Hall. 
" profuudum Hall. 
Coluiiiiian'a g-oldfttssi ? Bill (--=^.7C. 
carferensis Safford. 
Glyptocrinus friscus Bill. 
Bliisfoldocriniis carcharidcus Bill. 
Hybocrinus tiDnidus Bill. 
" coiiici/s Bill. 
Porocriniis couicus Bill. 
Carabocrinus radiatns Bill. 
Palaeocrinus aiigulatus Bill. 
Dendrocrinus acjitidactylus Bill. 
" jexvcfii Bill. 
Cleiocrinus refflus ? Bill. 
Amygdalocystitcs florctdis Bill. 
" radiatus Bill. 
A vomalocystites sp. 
Plcurocystites (species near P. 
sqiiamosiis Bill. 
Edrioaster bigsbvi Bill. 
Phyllodktya fro)7dosa . U Irich . 
Ori/iis f rice )i aria Conrad. 
" pectinclla Hall (abundant) 
" defiecta ? Conrad. 
Plafyxtrophia lynx var a. 
Strcptorhynchus fHitcxiis Hall. 
Zygospira recurvirosfris Hall. 
Rhynckonella subtrigonaUs Hall. 
Bi'UcrophoH bilobatiis Sowerbj. 
" {Cyrtolitcs) 7naccr Bill. 
Bncania pHuctifrons Emmons. 
" bidorsata Hall. 
buelli Whitfield. 
Pleurotomaria prognc Bill. 
" hyalr Bill. 
Troclionema ninbilicafioii Hall. 
Cyclonema percarinat uni Hall. 
Murchisonia alexandra Bill. 
" milleri Hall (typical.) 
" hcrmionc .' Bill. 
Ormoccras teuulflliDu Hall. 
Orthoceras arcnoUratum Hall. 
" amplkamerafjim Hall. 
" planoconvcxum Hall. 
" (seven undet. species.) 
Endoceras viulfitubtilatum ? Hall. 
" sp. undet. 
Pkragiiioceras .sp. undet. 
Cyrtoceras (five undet. species.) 
CoJpoccras gracilc Wetherby. 
Pterotheca sp. undet. 
Trlliiiomya astariifonnis Salter. 
CyprUarditcs haynUnia ? Saf. 
Beds VI. These beds seem to vary somewhat in thickness, 
but on an average may be said to be about thirty feet thick. 
At the base there are generally a few light drab layers that are 
slightly siliceous and charged with a large form of Orthis testu- 
dinaria. The remainder is made up of hydraulic limestones, 
which weather to a dark grev or drab color. They form rather 
even layers of from one to eight inches in thickness, with often 
shaly partings of like color. 
These beds are seen in a cut about three and one-half miles 
south of High Bridge, again in the bank of a creek a half mile 
south of Danville, where a fault brings them to the surface, at 
Frankfort and other localities in central Kentucky. 
The fossils in these beds are not evenly distributed, being 
abundant in some of the lavers and rare in others. Near the 
