PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 399 
Types.—Holotype: M.C.Z. 8603; figured paratype: M.C.Z. 8604; figured 
hypotypes: 110370, 111799, 111800a,b, 116975, 116976a,b,c, 116977, 118024a,b ; 
unfigured paratypes: 98030, 110332a, 116800c,d. Holotype of D. quadriplicata: 
M.C.Z. 8602 ; figured hypotypes : 116976a,b, measured hypotypes : 98038, 110320. 
Horizon and locality—Benbolt formation in Tennessee: 30 feet above the 
“Stones River” 100 yards west of the store at junction of Tennessee Highway 
33 and the Flint Creek road, Maynardville (T.V.A. 145-SE) Quadrangle; Win- 
stead Post Office (Shagtown), Anderson County ; Raccoon Valley, 18 miles north 
of Knoxville; Evans Ferry, north of Indian Creek on U. S. Highway 25E, 
Howard Quarter (T.V.A. 162-NW) Quadrangle; Tennessee Highway 33 at 
Nicely and Palmer’s store, 4 mile east of Kate, Maynardville (30’) Quadrangle ; 
head of Flint Creek, 14 miles northeast of Acuff, Powder Springs (T.V.A. 
154-SW) Quadrangle; 1 mile west of Lone Mountain, Tazewell (T.V.A. 
154-NE) Quadrangle; 14 miles northeast of Lone Mountain, east of Ball Creek 
on the road to Tazewell, Tazewell (T.V.A. 154-NE) Quadrangle; 1 mile south- 
east of White Horn, Bulls Gap (T.V.A. 171-SE) Quadrangle; north side of 
the highway, 1.6 miles northeast of Lee Valley (T.V.A. 171-NW) Quadrangle ; 
west side of the sharp loop of the road down Flint Creek, NW4 center subquad., 
Powder Springs (T.V.A. 154-SW) Quadrangle. 
Benbolt formation in Virginia: At Fugates Hill, north of Mendota, Bristol 
(30’) Quadrangle; 0.2 mile south of the middle fork of Moccasin Creek, 14 
miles due south of Hansonville, Hansonville (T.V.A. 205-SW) Quadrangle ; 
Brick Church 14 miles southwest of Rye Cove, Clinchport (T.V.A. 188-NW) 
Quadrangle; 5 miles north of Wytheville, Wythe County; south side of Mount 
Hagan School, southeast corner of the NE. subquad., Hilton (T.V.A. 197-NW) 
Quadrangle; 1 mile east of Hansonville, Hansonville (T.V.A. 205-SW) Quad- 
rangle; 4 mile south of Gate City, Gate City (T.V.A. 188-NE) Quadrangle ; 
north side of U. S. Highway 19, 1 mile due north of Belfast Mills, Saltville 
(T.V.A. 212-NE) Quadrangle; Speers Ferry, Clinchport (T.V.A. 188-NW) 
Quadrangle; just east of Meridian 17’30”, east of Moccasin Creek, north edge 
of Mendota (T.V.A. 197-NW) Quadrangle; 4 mile east of Cedar Point School, 
Hilton (T.V.A. 197-NW) Quadrangle; 4 mile southeast of Green Valley 
Church, Brumley (T.V.A. 205-SE) Quadrangle; 4 mile southeast of Richpatch, 
Eagle Rock (15’) Quadrangle; north side of U. S. Highway 19, 13 miles south- 
east of Hansonville, Brumley (T.V.A. 205-SE) Quadrangle; Virginia Highway 
74, 54 miles east of its junction with U. S. Highway 54 (Tennessee 71), Hilton 
(T.V.A. 197-NW) Quadrangle; vicinity of Rye Cove, Clinchport (T.V.A. 
188-NW) Quadrangle ; sandstone 4 mile southeast of Mooney Cemetery, 1 mile 
north-northwest of Otes, Bulls Gap (T.V.A. 171-SE) Quadrangle. 
Edinburg formation (Nidulites zone) on Strasburg (15’) Quadrangle, Vir- 
ginia: In a field on the east side of U. S. Highway 11, 14 miles north of Stras- 
burg ; Edinburg formation (upper part Cyrtonotella beds), along Tumbling Run, 
1% miles southwest of Strasburg; ravine at switch about } mile east of Strasburg 
Junction. 
