BRACHIOPODA. 



353 



CRANIID^S^Continutd. 



Orbicularius, Dumeril, 1806. Pholidops, Hall, 1869. 



Craniolites, Schlotheim, 1820. 



Choniopora, Schauroth, 1854. 

 Craniella, CEhlert, 1887. 

 Cardinockania, Waagen, 1885. 



Craniops, Hall, 1850. 

 Pseudocrania, McCoy, 1851. 



Palmocrania, Quenstedt, 1871. 



Sub-class ARTICULATA, Huxley; ARTHROPOMATA, Owen. 

 Order Protremata,* Beecher. 



Family KUTORaiNIDMA Schdchebt. 



KuTORGiNA, Billings, 1861. (?) Volborthia, von MoUer, 1873. 



ScHizoPHOLis, Waagen, 1885. Iphidea, Billings, 1872. 



Family ORTHIBM, Woodward. 



Orthis, Dalman, 1828. 



Orthambonites, Pander, 1830. 

 Plectorthis, Hall, 1892. 

 Dinorthis, Hall, 1892. 

 Plaesiomys, Hall, 1892. 

 Hebertella, Hall, 1892. 

 Orthostrophia, Hall, 1883. 

 Platystrophia, King, 1850. 

 Heterorthis, Hall, 1892. 



BiLOBiTES, Linne, 1775. 



Dicoelosia, King, 1850. 

 Dalmanella, Hall, 1892. 

 Rhipidomella, ffihlert, 1880. 



Rhipidomijs, CEhlert, 1887. 

 ScHizopHORiA, King, 1850. 

 Orthotichia, Hall, 1892. 

 Enteletes, Fischer de Waldheim, 1830. 



Syntrielasma, Meek, 1865. 



Family STROPHOMENID^., Kikg. 



Orthidium, Hall, 1892. Derbya, Waagen, 1884. 



Strophomena, Rafinesque (de Blain- Meekella, White and St. John, 1868. 

 ville), 1825. Streptorhynchus, King, 1850. 



* In employing' as the fundamental divisional di.«tiuction in the Articulata, the presence of the deltidiuni 

 or deltidial ]ilates, the term Protremata, lietter than any other, covers those genera in which the primitive 

 pedicle-covering- is I'epresented by either the deltidium, the spondylium, or both. 



+ Jlr. ScHucnERT includes under this family term two genera, Ki'torgina and Schkopbolis, which have 

 usually been regarded as belonging to the inarticulate sub-class. The rea-sons foi- installation of these as 

 the elementary family of the Articulata are given elsewhere. 



