PART I 
CHAZYAN AND RELATED BRACHIOPODS—-COOPER 
ANNOTATED LIST OF GENERA AND SPECIES—Continued 
Species 
Hesperorthis antelopensis 
Cooper 
H. australis Cooper 
H. biconvexa Cooper 
H. colei Cooper 
H. concava Cooper 
H, ? costalis (Hall) 
H., ? costellata Cooper 
H. crinerensis Cooper 
H. ? decipiens (Phleger) 
H. dubia Cooper 
H.ignicula (Raymond) 
H. longirostris Cooper 
H. matutina Cooper 
H. multicostata Cooper 
H. quadrata Cooper 
H., sulcata Cooper 
H., tenuicostata Cooper 
H. tricenaria (Conrad) 
H. virginiensis Cooper 
Hesperorthis sp. 1 
Hesperorthis sp. 2 
Idiospira ? inornata (Weller) 
I. panderi (Billings) 
I. ? warthim Cooper 
Idiostrophia costata Ulrich and 
Cooper 
I. nuda Cooper 
SPECIES 
Stage Formation 
Wilderness Dark shale under 
Eureka quartzite 
Wilderness Wardell, Dryden, 
Ridley 
Ashby Lincolnshire 
Trenton Decorah (Ion) 
Wilderness Platteville, 
Chaumont 
Marmor or Crown Point or 
Wilderness Chaumont? 
Porterfield Botetourt 
Porterfield Bromide 
(Mountain Lake) 
Ashby Barrel Spring 
Porterfield Sevier 
Marmor Valcour 
Ashby Whistle Creek, 
Lincolnshire, 
Ellett 
Ashby Tulip Creek 
Ashby Lincolnshire 
Wilderness Lebanon 
Wilderness Bromide 
(Pooleville) 
Marmor Lenoir 
Wilderness Guttenburg, 
to Trenton Auburn, 
Barnhart, 
Rockland, 
Curdsville 
Wilderness Oranda 
Porterfield Botetourt 
Wilderness ? Edinburg 
(middle Nidu- 
lites zone) 
Wilderness- Jacksonburg 
Trenton 
Wilderness- Tyrone, Auburn, 
Trenton Hull, Rockland, 
Guttenberg 
Trenton Wappinger 
Whiterock Boulders in 
Mystic cgl. 
Whiterock Upper Pogonip 
(Orthidiella 
zone) 
Geographic 
location 
Ney. 
Tenn., Va. 
Tenn. 
Minn., Iowa 
Ill., Wis., 
ING: 
N. Y. 
Va: 
Okla. 
Calif. 
Tenn. 
Nwy: 
Tenn., Va. 
Okla. 
Tenn. 
Ga., Tenn, 
Okla. 
Tenn., Va. 
TiN. Y., Mo., 
Wis., Ky., Va., 
Ontario 
Va. 
Va. 
Va. 
N. J. 
Ontario, 
Quebec, 
Mo., Ky., 
N. Y., Iowa 
N.Y. 
Quebec 
Ney. 
159 
691 
692 
588 
588 
