66 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
overlies the Ben Hur formation. The name is taken from Hardy Creek in the 
Jonesville District, Va. Brachiopods present are: 
Campylorthis sp. Strophomena sp. 
Opikina sp. Zygospira recurvirostris (Hall) 
Pionodema minuscula Willard 
Hatter formation.—This name was proposed by Kay (1944, p. 6) for a suc- 
cession of limestones overlying the Loysburg formation and underlying the Ben- 
ner formation in central Pennsylvania. It varies in thickness from 60 to 500 
feet. It consists of three members: Eyer, Grazier, and Hostler. The brachiopod 
content is listed under the various members. 
Heiskell shale-—Apparently the only appearance of this name in the litera- 
ture is on a chart by E. O. Ulrich (1911, pl. 27) correlating the Ordovician 
formations of the eastern half of the United States. On Ulrich’s chart, Heiskell 
is in the Tennessee Basin of the Appalachian Valley and in a division of this 
called the Pearisburg Trough. Heiskell shale is correlated with the Pearisburg 
limestone proposed by Bassler in 1907. According to Wilmarth, the shale was 
“Probably named for Heiskell, Knox Co., Tenn., in SE corner of Briceville 
quad.” The Heiskell is indicated by Ulrich as overlying the Holston and under- 
lying the Lowyville. 
At Heiskell a long sequence is fairly well exposed. Just east of the school 
grounds on the east side of the village Cryptophragmus occurs in abundance on 
the west side of a small stream. This would have been interpreted by Ulrich 
as Lowville limestone. Shaly beds are exposed at the four corners in the center 
of the village. These shales contain fossils of the Benbolt formation. Beneath 
them are limestones assigned to the Ward Cove formation, and beneath that 
limestones and red beds equivalent to the Hogskin and here called Fleanor 
formation. Thus the only rocks answering lithologically to the Heiskell are the 
Benbolt shales. Inasmuch as the name Heiskell was never established by defi- 
nition or designation of a type section it cannot replace the well-established and 
validly proposed name of Benbolt. 
Hermitage formation.—Butts identifies this formation in the Appalachians 
at Birmingham, Ala. The new species Sowerbyella angulata Cooper occurs in it. 
Hogskin member of Lincolnshire formation.—This name is proposed 
here by B. N. Cooper and G. A. Cooper for yellow-weathering shale and cobbly 
limestone, both of “Ottosee type” and usually confused with that formation, 
lying between the Eidson member of the Lincolnshire formation and the Ward 
Cove or Rockdell formations. The Hogskin has not been identified outside of 
eastern Tennessee. Belts from the north side of Knoxville nearly to the Cum- 
berland Front have this formation more or less well developed. One of the best 
displays is along the road from Thorn Hill to Washburn, especially at Red Hill 
about 4 miles west-southwest of Thorn Hill. It is also well displayed in the 
next belt to the north, in the Evans Ferry section along U. S. Highway 25E, 
north of Indian Creek in the southern part of the Howard Quarter Quadrangle. 
In the Heiskell-Maynardville belt the formation has passed over mostly to red 
