Type Specimens of Athyridid Brachiopods from the James Hall Collection

—Type specimens of 14 Lower Paleozoic athyridid species from the James Hall collection are selected or recognized, photographically illustrated, and briefly described and discussed. These include the lectotypes of the type species for the genera Charionella Billings, 1861 (Atrypa scitula Hall, 1843); Charionoides Boucot, Johnson, and Staton, 1964 (Meristella doris Hall, 1860); Meristina Hall, 1867 (Meristella maria Hall, 1863a); 'Whitfieldella Hall and Clarke, 1893 (Atrypa nitida Hall, 1843); Camarium Hall, 1859a (C. typum Hall, 1859a); Camarospira Hall and Clarke, 1893 (Camarophoria eucharis Hall, 1867); Nucleospira Hall in Davidson, 1858 (Spinier ventricosus Hall, 1857a); Rhynchospirina Schuchert and LeVene, 1929 ( Wa/dheimia formosa Hall, 1857a); Homoeospira Hall and Clarke, 1893 (Rhynchospirina evax Hall, 1863a); Leptospira Boucot, Johnson, and Staton, 1964 ( Trematospira costata Hall, 1859a); Trematospira Hall, 1859a (Spinier multistriatus Hall, 1857a); and Parazyga Hall and Clarke, 1893 (Attypa hirsuta Hall, 1857a) and the neotypes of the type species for the genera Meristella Hall, 1859a (Atrypa laevis Vanuxem, 1842) and Hyattidina Schuchert, 1913 (Atrypa congesta Conrad, 1842). Synonymies and emended diagnoses are also suggested for these type species.