BRACHIOPODA. 933 
Family Ortaip2, Woodward. 
Orthis, Dalman, 1828. Bilobites, Linné, 1775. 
Orthambonites, Pander, 1830. Dicelosia, King, 1850. 
Plectorthis, Hall, 1892. Dalmanella, Hall, 1892. 
Dinorthis, Hall, 1892. Rhipidomella, Gthlert, 1880. 
Plesiomys, Hall, 1892. Rhipidomys, CEhlert, 1887. 
Herbertella, Hall, 1882. Schizophoria, King, 1850. 
Orthostrophia, Hall, 1883. Orthotichia, Hall, 1892. 
Platystrophia, King, 1850. Enteletes, Fischer de Waldheim, 1830. 
Heterorthis, Hall, 1892. Syntrielasma, Meek, 1865. 
Family Srroppomentip®, King. 
Orthidium, Hall, 1892. Derbya, Waagen, 1884. 
Strophomena, Rafinesque (de Blain-| Meekella, White and St. John, 1868. 
ville), 1825. Streptorhynchus, King, 1850. 
Orthothetes, Fischer de Waldheim, | Triplecia, Hall, 1848. 
1830. Dicraniscus, Meek, 1872. 
Hipparionyx, Vanuxem, 1842. Mimulus, Barrande, 1879. 
Kayserella, Hall, 1892. Streptis, Davidson, 1881. 
Family Leprzynips. 
Leptzena, Dalman, 1828. Strophonella, Hall, 1879. 
Leptagonia, McCoy, 1844. Amphistrophia, Hall, 1892. 
Rafinesquina, Hall, 1892. Leptella, Hall, 1892. 
Stropheodonta, Hall, 1852. Plectambonites, Pander, 1830. 
Brachyprion, Shaler, 1865. Christiania, Hall, 1892. 
Douvillina, Ghlert, 1887. Lepteenisca, Beecher, 1890. 
Leptostrophia, Hall, 1892. Davidsonia, Bouchard, 1847. 
Pholidostrophia, Hall, 1892. Cadomella, Munier-Chalmas, 1887. 
Family CHonrrip£. 
Chonetes, Fischer de Waldheim, 1837. | Chonetina, Krotow, 1888. 
Anoplia, Hall, 1892. Chonostrophia, Hall, 1892. 
Chonetella, Waagen, 1884. Chonopectus, Hall, 1892. 
Family Propucrips, Gray. 
Strophalosia, King, 1844. Productella, Hall, 1867. 
Orthothrix, Geinitz, 1847. . | Productus, Hall, 1867. 
Lepteenalosia, King, 1845. Marginifera, Waagen, 1884. 
Daviesiella, Waagen, 1884. Proboscidella, Gihlert, 1887. 
Aulosteges, von Helmersen, 1847. Etheridgina, Ghlert, 1887, 
185 
