BRACHIOPODA. 
353 
CRA NIID ^— Continued. 
Orhicularius, Dumeril, 1806. 
Craniolites, Schlotheim, 1820. 
Choniopora, Schauroth, 1854. 
Craniella, (Ehlert, 1887. 
Cardinocrania, Waagen, 1885. 
Pholidops, Hall, 1869. 
Craniops, Hall, 1859. 
Pseudocrania, McCoy, 1851. 
Palczocrania, Quenstedt, 1871 
Sub-class APTICULATA, Huxley; ARTHROPOMATA, Owen. 
Order Protremata,^ Beecher. 
Family KUTORGrI]SfII).3S,\ Schuciiert. 
Kutorgina, Billings, 1861. (?) Yolborthia, von Moller, 1873. 
ScHizoPHOLis, Waagen, 1885. Iphidea, Billings, 1872. 
P’amily ORTHIR2E, 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, (Ehlert, 1880. 
Rhipidomys, (Ehlert, 1887. 
ScnizoPHORiA, King, 1850. 
Orthotichia, Hall, 1892. 
Enteletes, Fischer de Waldheim, 1830. 
Syntrielasma, Meek, 1865. 
Family RTROPHOMEmBRE, King. 
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 distinction in the Articulata, the presence of the deltidium 
or deltidial plates, the term Protremata, better than any other, covers those genera in which the primitive 
pedicle-covering is represented by either the deltidium, the sjiondylium, or both. 
t Mr. ScHDCUBRT includes under this family term two genera, Kutorgina and Schizopholis, which have 
usually been regarded as belonging to the inarticulate sub-class. The reasons for installation of these as 
the elementary family of the Articulata are given elsewhere. 
