42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
with black shale at the top, and calcarenite masses with Ptychoglypitus suggest 
the Effna formation of Virginia. 
In Virginia, at Marion and vicinity, the characteristic fossils of the Arline 
formation occur in cobbly and shaly limestone 225 feet thick which occur above 
the Maclurites beds of the Lenoir and interfinger with black shale of the Rich 
Valley formation. The position of these beds and the occurrence of typical Arline 
fossils elsewhere in Virginia in the Botetourt formation, as in Catawba Valley, 
make it clear that these two formations are at least partial equivalents. 
On the northeast side of the Saltville Thrust block at Porterfield Quarry, 5 
miles northeast of Saltville, a thin remnant of the Arline formation occurs under 
the Effna calcarenites and reefs. The latter contain many elements of the Arline 
fauna, and the siliceous dark limestone underlying the Effna contains a suite 
of species related to, but not identical with, those of typical Arline. 
The following brachiopods have been identified in the Arline formation of 
Tennessee (Knoxville to Friendsville) : 
Atelelasma holstoni (Hall and Clarke) ? 
A. perfectum Cooper 
Bimuria superba Ulrich and Cooper 
Camerella tennesseensis Cooper 
Christiania subquadrata (Hall) 
Conotreta ? alta Cooper 
Cyrtonotella virginiensis Butts 
Dactylogonia geniculata Ulrich and Cooper 
D. obtusa Cooper 
Eremotoechia cloudi Cooper 
E, silicica Cooper 
Glyptorthis concinnula Cooper 
Isophragma biseptatum Cooper 
I. extensum Cooper 
I. subabbreviatum Cooper 
Laticrura latibrachiata Cooper 
Leptellina tennesseensis Ulrich and Cooper 
Lingulasma matutinum Cooper 
Lingulella sp. 4 
Lingulella sp. 5 
Macrocoelia obesa Cooper 
Multicostella planosulcata Cooper 
M. plena Cooper 
M. saffordi (Hall and Clarke) ? 
Opikina glabella Cooper 
Orthambonites angulatus Cooper 
O. blountensis Cooper 
O. friendsvillensis Cooper 
O. tennesseensis Cooper 
Oxoplecia plicata Cooper 
Palaeostrophomena superba Cooper 
Paterula perfecta Cooper 
Paurorthis fasciculata Cooper 
P. longa Cooper 
Perimecocoelia elliptica Cooper 
Phragmorthis buttsi Cooper 
Platymena plana Cooper 
Plectorthis australis Cooper 
P. compacta Cooper 
Productorthis americana Cooper 
(Virginia, Marion quarry) 
Ptychopleurella globularis Cooper 
Rhipidomena sp. 1 
Schizambon irregulare Cooper 
S. subradiatum Cooper 
Siphonotreta americana Cooper 
Sowerbyella varicostellata Cooper 
Taphrorthis emarginata Cooper 
Titanambonites amplus (Raymond) 
Valcourea brevicarinata Cooper 
Valcourea sp. 4 
The thinned Arline at Porterfield Quarry in Virginia has yielded: 
Leptellina transversa Cooper 
Opikina matutina Cooper 
Palaeostrophomena subtransversa Cooper 
Sowerbyella silicica Cooper 
S. silicica nana Cooper 
Valcourea semicarinata Cooper 
