BRACHIOPODA. 
357 
Family TEREBRATELLIDJE, King. 
Tropidoleptus, Hall, 1857. 
Sub-order Helicopegmata, or Spiriferacea, Waagen. 
Family ATRTPIBJE, Ball. 
Hallina, N. H. Winchell and Schuchert, Catazyga, Hall, 1893. 
1892. 
Protozyga, Hall, 1893. 
(?) Cyclospira, Hall, 1893. 
Zygospira, Hall, 1862. 
Anazyga, Davidson, 1882. 
Orthonom^ea, Hall, 1858. 
Glassia, Davidson, 1882. 
Atrypina, Hall, 1893. 
(?) Clintonella, Hall, 1893. 
Atrypa, Dalman, 1828. 
Karpinskia, Tschernyschew, 1885. 
Gruenewaldtia, Tschernyschew, 1885 
Family SPIRIPERINIDJE, Davidson. 
Cyrtina, Davidson, 1858. 
Spiriferina, d’Orbigny, 1847. 
Family SPIRIFERIDJE, King. 
Spirifer, Sowerby, 1815. Martinia, McCoy, 1844. 
Trigonotreta, Koenig, 1825. Martiniopsis, Waagen, 1883. 
Brachythyris, McCoy, 1844. Cyrtia, Dalman, 1828. 
Fusella, McCoy, 1844. Syringothyris, A. Winchell, 1863. 
Choristites, Fischer deWaldheim, 1825. Amboccelia, Hall, 1860. 
Delthyrts, Dalman, 1828. Metaplasia, Hall, 1893. 
Reticularia, McCoy, 1844. Verneuilia, Hall, 1893. 
Family NUCLE08PIRIDRS, Davidson. 
Nucleospira, Hall, 1858. Whitfieldella, Hall, 1893. 
Dayia, Davidson, 1882. Hyattella, Hall, 1893. 
Hindella, Davidson, 1882. (?) Camarospira, Hall, 1893. 
Family CCELOSPIRIPAE. 
Anoplotheca, Sandberger, 1856. Leptoccelia, Hall, 1859. 
Bifida, Davidson, 1882. (?) Anabaia, Clarke, 1893. 
CcELOSPiRA, Hall, 1863. 
