PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 219 
road cut at Summit Hill School 1 mile southwest of Otes; 14 miles northeast 
of Bulls Gap; 14 miles west of Bulls Gap. Edinburg formation (Liberty Hall 
facies) in Virginia: 300 feet west of Route 3, ? mile northeast of Nineveh, Win- 
chester (15’) Quadrangle; opposite the bridge at Riverton; near Front Royal, 
Front Royal (15’) Quadrangle. 
Chatham Hill formation in Virginia: John Grayson Farm, 4 miles southwest 
of Bland, Bland County. 
Paperville formation in Virginia: 4 mile northwest of Hollins School, Roa- 
noke (15’) Quadrangle. 
Discussion.—This is one of the largest known species of linguloid, and the 
recorded dimensions given above are not those of the largest specimens, but of 
the most perfect ones. An imperfect individual from the Athens shale of White- 
horn, Tenn., measures 69 mm. in length, but portions of the anterior and pos- 
terior are missing, which would probably place the actual length in the neighbor- 
hood of 75 mm., or 3 inches. The width of the specimen is 29 mm. 
This species is most like E. nympha Billings from the Table Head formation 
of Newfoundland but differs in being proportionally narrower and with less deep 
valves. Billings’ species is 3 times as long as wide, and its sides are more parallel 
than those of E. nymphoidea. 
ECTENOGLOSSA ? RUBRA Cooper, new species 
Plate 8,J, figures 21-26 
Shell large, somewhat quadrate in outline. Lateral margins nearly parallel ; 
anterolateral extremities narrowly rounded, anterior margin gently curved ; apex 
obtusely angular. Surface marked by scattered concentric undulations and very 
fine, concentric, closely crowded, wavy lines particularly on the median region. 
Pedicle valve with greatest depth slightly posterior to the middle ; anterior and 
posterior slopes gentle; anterior profile broadly convex, flattened in the median 
area and with short moderately steep lateral slopes. Brachial valve somewhat 
deeper than the pedicle valve but with similar profiles. 
Measurements in mm.— 
Length Width Thickness 
TRIE VIDE ort c ct igs hee alone imepeide « hyaatsreninnes aabhh 36.2 20.2 5.0 ? 
Pare CPEOZIID)) cx)=, cos-> a) dios wa abe hacen ee 21.2 16.8 9.2 
Types.—Holotype: 116777a; figured paratype: 116777b; unfigured paratypes: 
116777C¢,d. 
Horizon and locality.—Base of the Bays formation in Tennessee: 14 miles 
south-southeast of Houk, Loudon (30’) Quadrangle=o.15 mile northeast of 
Fourmile Church, Tallassee (T.V.A. 139-SE) Quadrangle. 
Discussion——This species is interesting because it occurs in red beds. It is 
characterized by its deep and elongate valve. It is somewhat like E. nymphoidea 
but is not so large and is differently ornamented. The finely crinkled lines are 
quite distinctive. 
