432 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, XXXIV. 
Powell Mountain group of ridges in East Tennessee, and publishes 
a section“ in which the Meniscus limestone is identified between the 
Dyestone (Rockwood) group and the Black Shale. Halysites catenu- 
latus and other fossils were noted. We have not visited this locality, 
but specimens in the U. S. National Museum collections indicate the 
probable equivalence of this limestone with the coral beds of the 
Lobelville formation in West Tennessee. This identification is in 
keeping with the facts concerning the wide extension of this coral 
zone, but the section here must be restudied before a definite correla- 
tion can be made. Professor Safford notes a locality 4 miles south- 
east of the salt works in Anderson County where a cherty bed in con- 
tact with the black shale is well charged with corals. The fauna in 
the U. S. National Museum collections noted from Sneedville are 
Tlalysites catenulatus (large and small mesh), /7. near nexus, Favo- 
sites favosus, FP. venustus, Heliolites cfr. micropora, and several spe- 
cies of large Orthocerata. | 
In southern Indiana and northern Kentucky the strata of Silurian 
age between the Waldron shale and the overlying Devonian rocks have 
been designated the Louisville limestone by Foerste. The publica- 
tions of Hall, Nettelroth, Lyon, Davis, and others have made known 
a large fauna from these strata, but, to the best of our knowledge, no 
detailed account of their stratigraphy has ever been printed. ‘Such 
an account can not now be furnished, but enough is known to indicate 
that the Niagaran limestone in the immediate vicinity of Louisville, 
Kentucky, have representatives of the Coral and possibly the Con- 
chidium beds of West Tennessee. The uppermost 8 feet of the Louis- 
ville Silurian section are of argillaceous cherty limestone, holding 
great numbers of the corals listed on page 487. Beneath these layers 
are about 30 feet of strata similar lithologically but containing fewer 
corals. The next lower rocks are exposed along Bear Grass Creek, 
where the strata are seen to be blue in color and cherty. Here fossils 
are scarcer, but the prevailing forms are pentameroid brachiopods. 
The Louisville limestone, therefore, in the immediate vicinity of 
Louisville is apparently equivalent to our Lobelville formation and 
not to the entire post-Dixon Niagaran formations of West Tennessee. 
4 Geology of Tennessee, 1869, p. 294. 
