BRAoHIOPODA. 4 937 
Family Spremerm.s, King. 
Spirifer, Sowerby, 1815. Martiniopsis, Waagen, 1883. 
Choristites, Fischer de Waldheim, 1825. | Cyrtia, Dalman, 1828. 
Trigonotreta, Koenig, 1825. Syringothyris, A. Winchell, 1863. 
Brachythyris, McCoy, 1844. Amboccelia, Hall, 1860. 
Fusella, McCoy, 1844. Metaplasia, Hall, 1893. 
Delthyris, Dalman, 1828. Verneulia, Hall, 1893. 
Reticularia, McCoy, 1844. Mentzelia, Quenstedt, 1871. 
Martinia, McCoy, 1844. 
Family Nvoxzosriripx, Davidson. 
Nucleospira, Hall, 1858. Whitfieldella, Hall, 1893. 
Dayia, Davidson, 1882. Hyattella, Hall, 1893. 
Hindella, Davidson, 1882. (?) Camarospira, Hall, 1893. 
Family Catospiripe. 
Leptoccelia, Hall, 1859. 
(?) Anabaia, Clarke, 1893. 
Anoplotheca, Sandberger, 1856. 
Bifida, Davidson, 1882. 
Coelospira, Hall, 18638. 
Family Rerzup2. 
Rhynchospira, Hall, 1859. Retzia, King, 1850. 
Homeeospira, Hall, 1893. Uncinella, Waagen, 1883. 
Ptychospira, Hall, 1893. Eumetria, Hall,*1864. 
Trematospira, Hall, 1857. Acambona, White, 1862. 
Parazyga, Hall, 1893. Hustedia, Hall, 1893. 
Family Uncrtipm, Waagen. 
Uncites, Defrance, 1825. 
Family Meristetitip, Waagen. 
Merista, Suess, 1851. Charionella, Billings, 1861. 
Camarium, Hall, 1859. (?) Pentagonia, Cozzens, 1846. 
Dicamara, Hall, 1893. Goniocclia, Hall, 1861. 
Meristella, Hall, 1860. Dioristella, Bittner, 1890. 
, Family Atayripz, Waagen. 
Meristina, Hall, 1867. Anomactinella, Bittner, 1890. 
Whitfieldia, Davidson, 1882. Amphitomella, Bittner, 1890. 
Glassina, Hall, 1893. Pomatospirella, Bittner, 1893. 
Athyris, McCoy, 1844. Tetractinella, Bittner, 1890. 
Spirigera, d’Orbigny, 1847. Pentactinella, Bittner, 1890. 
Cliothyris, King, 1850. Diplospirella, Bittner, 1890. 
Actinoconchus, McCoy, 1844. Euractinella, Bittner, 1890. 
Seminula, McCoy, 1844. Pexidella, Bittner, 1890. 
Spirigerella, Waagen, 1883. Anisactinella, Bittner, 1890. 
’ Kayseria, Davidson, 1882. 
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